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Account Verification with Authy, Python and Flask

Kat King

Published on 2018-04-11

Download the Code

Ready to add Authy user account verification to your Flask application? Don't worry, this will be the easiest thing you do all day.

Here's how it all works at a high level:

A user begins the registration process by entering their information (including a phone number) into a signup form.
The authentication system sends a one-time password to the user's mobile phone to verify the phone number.
The user enters that one-time password into a form to complete registration.
The user sees a success page and receives an SMS alerting them that their account has been created!

Building Blocks

To get this done, you'll be working with the following Twilio-powered APIs:

Authy REST API

Authy Docs: Find quickstarts, documentation, and info on the helper libraries.

Twilio REST API

Messages Resource: We will use Twilio directly to send our users a confirmation message after they creates their accounts.

Initialize Flask application

from flask import Flask
from flask.ext.login import LoginManager
from flask.ext.sqlalchemy import SQLAlchemy
from flask.ext.bcrypt import Bcrypt
from account_verification_flask.config import config_env_files

db = SQLAlchemy()
bcrypt = Bcrypt()
login_manager = LoginManager()


def create_app(config_name='development', p_db=db, p_bcrypt=bcrypt, p_login_manager=login_manager):
    new_app = Flask(__name__)
    new_app.config.from_object(config_env_files[config_name])

    p_db.init_app(new_app)
    p_bcrypt.init_app(new_app)
    p_login_manager.init_app(new_app)
    p_login_manager.login_view = 'register'
    return new_app


app = create_app()

import account_verification_flask.views

account_verification_flask/__init__.py

Initialize Flask application

account_verification_flask/__init__.py

All of this can be done in under a half an hour with the simplicity and power of Authy and Twilio. Let's get started!

Click me to move on to the next step!

Application configuration

For this application we'll be using the The Twilio Python Helper Library and the Python Client for Authy API. We require some configuration from your side before we can begin.

Edit the DevelopmentConfig class constant values located in the account_verification_flask/config.py file:

AUTHY_KEY = 'your_authy_key'

TWILIO_ACCOUNT_SID = 'your_twilio_account_sid'
TWILIO_AUTH_TOKEN = 'your_twilio_auth_token'
TWILIO_NUMBER = 'your_twilio_phone_number'

SQLALCHEMY_DATABASE_URI = 'sqlite://'

Note that you have to replace the placeholders your_twilio_account_sid, your_twilio_auth_token, your_twilio_phone_number and your_authy_key with your information. You can find all of those parameters (and more) in your Twilio Account Console and your Authy dashboard.

Configure your application with Twilio and Authy

class DefaultConfig(object):
    SECRET_KEY = '%^!@@*!&$8xdfdirunb52438#(&^874@#^&*($@*(@&^@)(&*)Y_)((+'
    SQLALCHEMY_DATABASE_URI = 'sqlite://'


class DevelopmentConfig(DefaultConfig):
    AUTHY_KEY = 'your_authy_key'

    TWILIO_ACCOUNT_SID = 'your_twilio_account_sid'
    TWILIO_AUTH_TOKEN = 'your_twilio_auth_token'
    TWILIO_NUMBER = 'your_twilio_phone_number'

    SQLALCHEMY_DATABASE_URI = 'sqlite://'
    DEBUG = True


class TestConfig(DefaultConfig):
    SQLALCHEMY_ECHO = True

    DEBUG = True
    TESTING = True
    WTF_CSRF_ENABLED = False


config_env_files = {
    'test': 'account_verification_flask.config.TestConfig',
    'development': 'account_verification_flask.config.DevelopmentConfig',
}

account_verification_flask/config.py

Configure your application with Twilio and Authy

account_verification_flask/config.py

Now that we've got the setup boilerplate out of the way, let's take a look at the User model.

Visit our user model

The User Model

The User Model for this tutorial is pretty straight-forward. Note the new variable authy_user_id, which is implemented for storing the user's Authy identification token.

We'll be using the Flask-Login library for our user session management. To integrate this library into our code we need to implement a few properties and methods, then we're good to go.

User model with DB configuration and model methods for Flask-Login

# from flask.ext.login import UserMixin
from account_verification_flask import db, bcrypt


class User(db.Model):
    __tablename__ = "users"

    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String, nullable=False)
    email = db.Column(db.String, nullable=False)
    password = db.Column(db.String)
    phone_number = db.Column(db.String, nullable=False)
    country_code = db.Column(db.String, nullable=False)
    phone_number_confirmed = db.Column(db.Boolean, nullable=False, default=False)
    authy_user_id = db.Column(db.String, nullable=True)

    def __init__(self, name, email, password, phone_number, country_code):
        self.name = name
        self.email = email
        self.password = bcrypt.generate_password_hash(password)
        self.phone_number = phone_number
        self.country_code = country_code
        self.phone_number_confirmed = False

    def is_authenticated(self):
        return True

    def is_active(self):
        return True

    def is_anonymous(self):
        return False

    def get_id(self):
        return unicode(self.id)

    def __unicode__(self):
        return self.name

    def __repr__(self):
        return '<User %r>' % (self.name)

account_verification_flask/models/models.py

User model with DB configuration and model methods for Flask-Login

account_verification_flask/models/models.py

Pretty simple User model, right? Next we're going to visit the registration form on the client side.

Take a look at the user registration form

Registration Form

In order to validate the user's account and register the user, we need a mobile number with a country code. We can then use Authy to send a verification code via SMS.

In this example we're validating and rendering the forms with the WTForms library. This allows us to define the forms as classes inside Python.

User registration form

{% extends "layout.html" %}

{% block content %}

<h1>We're going to be *BEST* friends</h1>
<p> Thanks for your interest in signing up! Can you tell us a bit about yourself?</p>


<form method="POST" class="form-horizontal" role="form">
    {% from "_formhelpers.html" import render_errors, render_field %}
    {{ form.csrf_token }}
    {{ render_errors(form) }}
    <hr/>

    {{ render_field(form.name, placeholder='Anakin Skywalker') }}
    {{ render_field(form.email, placeholder='darth@vader.com') }}
    {{ render_field(form.password) }}
    {{ render_field(form.country_code, id="authy-countries" ) }}
    {{ render_field(form.phone_number , type='number') }}

    <div class="form-group">
        <div class="col-md-offset-2 col-md-10">
            <input type="submit" class="btn btn-primary" value="Sign Up" />
        </div>
    </div>
</form>

{% endblock %}

account_verification_flask/templates/register.html

User registration form

account_verification_flask/templates/register.html

That's it for the client side. Now let's look at what happens when the user submits the form.

Let's look at the form code on the server side

Registration Server Side Implementation

Next our controller stores the new user, registers them with Authy's API, and requests a new verification code.

The registration view route

from datetime import datetime
from flask import session, request, flash, url_for, abort, g
from flask.ext.login import login_user, logout_user, current_user, login_required
from account_verification_flask import app, db, login_manager
from account_verification_flask.forms.forms import RegisterForm, ResendCodeForm, VerifyCodeForm
from  account_verification_flask.models.models import User
from account_verification_flask.services.authy_services import AuthyServices
from account_verification_flask.services.twilio_services import TwilioServices
from account_verification_flask.utilities.view_helpers import *
import account_verification_flask.utilities


@app.route('/')
@app.route('/home')
def home():
    return view('index')


@app.route('/register', methods=["GET", "POST"])
def register():
    form = RegisterForm()
    if request.method == 'POST':
        if form.validate_on_submit():

            if User.query.filter(User.email == form.email.data).count() > 0:
                form.email.errors.append(account_verification_flask.utilities.User_Email_Already_In_Use)
                return view('register', form)

            user = User(
                name=form.name.data,
                email=form.email.data,
                password=form.password.data,
                country_code=form.country_code.data,
                phone_number=form.phone_number.data
            )
            db.session.add(user)
            db.session.commit()

            authy_services = AuthyServices()
            if authy_services.request_phone_confirmation_code(user):
                db.session.commit()
                flash(account_verification_flask.utilities.Verification_Code_Sent)
                return redirect_to('verify', email=form.email.data)

            form.email.errors.append(account_verification_flask.utilities.Verification_Code_Not_Sent)

        else:
            return view('register', form)

    return view('register', form)


@app.route('/verify', methods=["GET", "POST"])
@app.route('/verify/<email>', methods=["GET"])
def verify():
    form = VerifyCodeForm()
    if request.method == 'POST':
        if form.validate_on_submit():
            user = User.query.filter(User.email == form.email.data).first()

            if user == None:
                form.email.errors.append(account_verification_flask.utilities.User_Not_Found_For_Given_Email)
                return view('verify_registration_code', form)

            if user.phone_number_confirmed:
                form.email.errors.append(User_Already_Confirmed)
                return view('verify_registration_code', form)

            authy_services = AuthyServices()
            if authy_services.confirm_phone_number(user, form.verification_code.data):
                user.phone_number_confirmed = True
                db.session.commit()
                login_user(user, remember=True)
                twilio_services = TwilioServices()
                twilio_services.send_registration_success_sms("+{0}{1}".format(user.country_code, user.phone_number))
                return redirect_to('status')
            else:
                form.email.errors.append(account_verification_flask.utilities.Verification_Unsuccessful)
                return view('verify_registration_code', form)
    else:
        form.email.data = request.args.get('email')
    return view('verify_registration_code', form)


@app.route('/resend', methods=["GET", "POST"])
@app.route('/resend/<email>', methods=["GET"])
def resend(email=""):
    form = ResendCodeForm()

    if request.method == 'POST':
        if form.validate_on_submit():
            user = User.query.filter(User.email == form.email.data).first()

            if user == None:
                form.email.errors.append(account_verification_flask.utilities.User_Not_Found_For_Given_Email)
                return view('resend_confirmation_code', form)

            if user.phone_number_confirmed:
                form.email.errors.append(account_verification_flask.utilities.User_Already_Confirmed)
                return view('resend_confirmation_code', form)
            authy_services = AuthyServices()
            if authy_services.request_phone_confirmation_code(user):
                flash(account_verification_flask.utilities.Verification_Code_Resent)
                return redirect_to('verify', email=form.email.data)
            else:
                form.email.errors.append(account_verification_flask.utilities.Verification_Code_Not_Sent)
    else:
        form.email.data = email

    return view('resend_confirmation_code', form)


@app.route('/status')
def status():
    return view('status')


@app.route('/logout', methods=["POST"])
def logout():
    logout_user()
    return redirect_to('home')


# controller utils
@app.before_request
def before_request():
    g.user = current_user


@login_manager.user_loader
def load_user(id):
    try:
        return User.query.get(id)
    except:
        return None

account_verification_flask/views.py

The registration view route

account_verification_flask/views.py

Next we'll set up our application to complete our user verification.

What happens when a verification code comes in?

Verifying a User in Python

On the server we first check that the email belongs to a user that we haven't yet verified.

The process then has two critical steps:

Communicate with Authy's API to check if the given code is correct.
Send a confirmation SMS to the user using Twilio's API.

After that (assuming a success!) we redirect the user to a success page.

Verify a user's code and send a success SMS

from datetime import datetime
from flask import session, request, flash, url_for, abort, g
from flask.ext.login import login_user, logout_user, current_user, login_required
from account_verification_flask import app, db, login_manager
from account_verification_flask.forms.forms import RegisterForm, ResendCodeForm, VerifyCodeForm
from  account_verification_flask.models.models import User
from account_verification_flask.services.authy_services import AuthyServices
from account_verification_flask.services.twilio_services import TwilioServices
from account_verification_flask.utilities.view_helpers import *
import account_verification_flask.utilities


@app.route('/')
@app.route('/home')
def home():
    return view('index')


@app.route('/register', methods=["GET", "POST"])
def register():
    form = RegisterForm()
    if request.method == 'POST':
        if form.validate_on_submit():

            if User.query.filter(User.email == form.email.data).count() > 0:
                form.email.errors.append(account_verification_flask.utilities.User_Email_Already_In_Use)
                return view('register', form)

            user = User(
                name=form.name.data,
                email=form.email.data,
                password=form.password.data,
                country_code=form.country_code.data,
                phone_number=form.phone_number.data
            )
            db.session.add(user)
            db.session.commit()

            authy_services = AuthyServices()
            if authy_services.request_phone_confirmation_code(user):
                db.session.commit()
                flash(account_verification_flask.utilities.Verification_Code_Sent)
                return redirect_to('verify', email=form.email.data)

            form.email.errors.append(account_verification_flask.utilities.Verification_Code_Not_Sent)

        else:
            return view('register', form)

    return view('register', form)


@app.route('/verify', methods=["GET", "POST"])
@app.route('/verify/<email>', methods=["GET"])
def verify():
    form = VerifyCodeForm()
    if request.method == 'POST':
        if form.validate_on_submit():
            user = User.query.filter(User.email == form.email.data).first()

            if user == None:
                form.email.errors.append(account_verification_flask.utilities.User_Not_Found_For_Given_Email)
                return view('verify_registration_code', form)

            if user.phone_number_confirmed:
                form.email.errors.append(User_Already_Confirmed)
                return view('verify_registration_code', form)

            authy_services = AuthyServices()
            if authy_services.confirm_phone_number(user, form.verification_code.data):
                user.phone_number_confirmed = True
                db.session.commit()
                login_user(user, remember=True)
                twilio_services = TwilioServices()
                twilio_services.send_registration_success_sms("+{0}{1}".format(user.country_code, user.phone_number))
                return redirect_to('status')
            else:
                form.email.errors.append(account_verification_flask.utilities.Verification_Unsuccessful)
                return view('verify_registration_code', form)
    else:
        form.email.data = request.args.get('email')
    return view('verify_registration_code', form)


@app.route('/resend', methods=["GET", "POST"])
@app.route('/resend/<email>', methods=["GET"])
def resend(email=""):
    form = ResendCodeForm()

    if request.method == 'POST':
        if form.validate_on_submit():
            user = User.query.filter(User.email == form.email.data).first()

            if user == None:
                form.email.errors.append(account_verification_flask.utilities.User_Not_Found_For_Given_Email)
                return view('resend_confirmation_code', form)

            if user.phone_number_confirmed:
                form.email.errors.append(account_verification_flask.utilities.User_Already_Confirmed)
                return view('resend_confirmation_code', form)
            authy_services = AuthyServices()
            if authy_services.request_phone_confirmation_code(user):
                flash(account_verification_flask.utilities.Verification_Code_Resent)
                return redirect_to('verify', email=form.email.data)
            else:
                form.email.errors.append(account_verification_flask.utilities.Verification_Code_Not_Sent)
    else:
        form.email.data = email

    return view('resend_confirmation_code', form)


@app.route('/status')
def status():
    return view('status')


@app.route('/logout', methods=["POST"])
def logout():
    logout_user()
    return redirect_to('home')


# controller utils
@app.before_request
def before_request():
    g.user = current_user


@login_manager.user_loader
def load_user(id):
    try:
        return User.query.get(id)
    except:
        return None

account_verification_flask/views.py

Verify a user's code and send a success SMS

account_verification_flask/views.py

What happens if the message was never sent, didn't arrive, or can't be found? Let's look at how to handle those scenarios next.

And how about handling exceptions?

Re-sending a Verification Code

The form for re-sending the code is a single line, so let's skip that detail for this tutorial. Instead, let's just take a look at the controller function for resending verifications.

This controller loads the User associated with the request and then uses the same Authy API method we used earlier to resend the code. Pretty straightforward, right?

Re-send a verification code

from datetime import datetime
from flask import session, request, flash, url_for, abort, g
from flask.ext.login import login_user, logout_user, current_user, login_required
from account_verification_flask import app, db, login_manager
from account_verification_flask.forms.forms import RegisterForm, ResendCodeForm, VerifyCodeForm
from  account_verification_flask.models.models import User
from account_verification_flask.services.authy_services import AuthyServices
from account_verification_flask.services.twilio_services import TwilioServices
from account_verification_flask.utilities.view_helpers import *
import account_verification_flask.utilities


@app.route('/')
@app.route('/home')
def home():
    return view('index')


@app.route('/register', methods=["GET", "POST"])
def register():
    form = RegisterForm()
    if request.method == 'POST':
        if form.validate_on_submit():

            if User.query.filter(User.email == form.email.data).count() > 0:
                form.email.errors.append(account_verification_flask.utilities.User_Email_Already_In_Use)
                return view('register', form)

            user = User(
                name=form.name.data,
                email=form.email.data,
                password=form.password.data,
                country_code=form.country_code.data,
                phone_number=form.phone_number.data
            )
            db.session.add(user)
            db.session.commit()

            authy_services = AuthyServices()
            if authy_services.request_phone_confirmation_code(user):
                db.session.commit()
                flash(account_verification_flask.utilities.Verification_Code_Sent)
                return redirect_to('verify', email=form.email.data)

            form.email.errors.append(account_verification_flask.utilities.Verification_Code_Not_Sent)

        else:
            return view('register', form)

    return view('register', form)


@app.route('/verify', methods=["GET", "POST"])
@app.route('/verify/<email>', methods=["GET"])
def verify():
    form = VerifyCodeForm()
    if request.method == 'POST':
        if form.validate_on_submit():
            user = User.query.filter(User.email == form.email.data).first()

            if user == None:
                form.email.errors.append(account_verification_flask.utilities.User_Not_Found_For_Given_Email)
                return view('verify_registration_code', form)

            if user.phone_number_confirmed:
                form.email.errors.append(User_Already_Confirmed)
                return view('verify_registration_code', form)

            authy_services = AuthyServices()
            if authy_services.confirm_phone_number(user, form.verification_code.data):
                user.phone_number_confirmed = True
                db.session.commit()
                login_user(user, remember=True)
                twilio_services = TwilioServices()
                twilio_services.send_registration_success_sms("+{0}{1}".format(user.country_code, user.phone_number))
                return redirect_to('status')
            else:
                form.email.errors.append(account_verification_flask.utilities.Verification_Unsuccessful)
                return view('verify_registration_code', form)
    else:
        form.email.data = request.args.get('email')
    return view('verify_registration_code', form)


@app.route('/resend', methods=["GET", "POST"])
@app.route('/resend/<email>', methods=["GET"])
def resend(email=""):
    form = ResendCodeForm()

    if request.method == 'POST':
        if form.validate_on_submit():
            user = User.query.filter(User.email == form.email.data).first()

            if user == None:
                form.email.errors.append(account_verification_flask.utilities.User_Not_Found_For_Given_Email)
                return view('resend_confirmation_code', form)

            if user.phone_number_confirmed:
                form.email.errors.append(account_verification_flask.utilities.User_Already_Confirmed)
                return view('resend_confirmation_code', form)
            authy_services = AuthyServices()
            if authy_services.request_phone_confirmation_code(user):
                flash(account_verification_flask.utilities.Verification_Code_Resent)
                return redirect_to('verify', email=form.email.data)
            else:
                form.email.errors.append(account_verification_flask.utilities.Verification_Code_Not_Sent)
    else:
        form.email.data = email

    return view('resend_confirmation_code', form)


@app.route('/status')
def status():
    return view('status')


@app.route('/logout', methods=["POST"])
def logout():
    logout_user()
    return redirect_to('home')


# controller utils
@app.before_request
def before_request():
    g.user = current_user


@login_manager.user_loader
def load_user(id):
    try:
        return User.query.get(id)
    except:
        return None

account_verification_flask/views.py

Re-send a verification code

account_verification_flask/views.py

Let's take a step back and see how we can use Authy to resend a verification code to an unverified user.

Send a token on account creation

Sending a Token on Account Creation

In order to end up with a cleaner and decoupled design we'll encapsulate all of Authy's related features in an AuthyService. This class will hold a shared class instance of the AuthyApiClient class.

Once the user has an authyId we can send a verification code to that user's mobile phone.

Send Authy token via SMS

import account_verification_flask.utilities
from account_verification_flask.utilities.settings import AuthySettings
from authy.api import AuthyApiClient


class AuthyServices:
    authy_client = None

    def __init__(self):
        if AuthyServices.authy_client == None:
            AuthyServices.authy_client = AuthyApiClient(AuthySettings.key())

    def request_phone_confirmation_code(self, user):
        if user == None:
            raise ValueError(account_verification_flask.utilities.User_Id_Not_Found)

        if user.authy_user_id == None:
            self._register_user_under_authy(user)

        sms = AuthyServices.authy_client.users.request_sms(user.authy_user_id, {'force': True})
        return not sms.ignored()

    def confirm_phone_number(self, user, verification_code):
        if user == None:
            raise ValueError(account_verification_flask.utilities.User_Id_Not_Found)

        verification = AuthyServices.authy_client.tokens.verify(user.authy_user_id, verification_code)
        return verification.ok()

    def _register_user_under_authy(self, user):
        authy_user = AuthyServices.authy_client.users.create(user.email, user.phone_number, user.country_code)
        if authy_user.ok:
            user.authy_user_id = authy_user.id

account_verification_flask/services/authy_services.py

Send Authy token via SMS

account_verification_flask/services/authy_services.py

When our user is created successfully via the form we have implemented, we send a token to the user's mobile phone asking them to verify their account in our controller. When the code is sent, we redirect our users to another page where they can enter the received token, completing the verification process.

Next: Verifying the user's code with Authy

Verifying the Code

Authy provides us with a tokens.verify method that allows us to pass a user id and token. In this case we just need to check that the API request was successful and, if so, set a verified flag on the user.

Verify a user's token with AuthyServices

import account_verification_flask.utilities
from account_verification_flask.utilities.settings import AuthySettings
from authy.api import AuthyApiClient


class AuthyServices:
    authy_client = None

    def __init__(self):
        if AuthyServices.authy_client == None:
            AuthyServices.authy_client = AuthyApiClient(AuthySettings.key())

    def request_phone_confirmation_code(self, user):
        if user == None:
            raise ValueError(account_verification_flask.utilities.User_Id_Not_Found)

        if user.authy_user_id == None:
            self._register_user_under_authy(user)

        sms = AuthyServices.authy_client.users.request_sms(user.authy_user_id, {'force': True})
        return not sms.ignored()

    def confirm_phone_number(self, user, verification_code):
        if user == None:
            raise ValueError(account_verification_flask.utilities.User_Id_Not_Found)

        verification = AuthyServices.authy_client.tokens.verify(user.authy_user_id, verification_code)
        return verification.ok()

    def _register_user_under_authy(self, user):
        authy_user = AuthyServices.authy_client.users.create(user.email, user.phone_number, user.country_code)
        if authy_user.ok:
            user.authy_user_id = authy_user.id

account_verification_flask/services/authy_services.py

Verify a user's token with AuthyServices

account_verification_flask/services/authy_services.py

That's it for token verification! Let's provide a nice user onboarding experience, and send a confirmation message to our new user.

Wrap it up with a nice confirmation message

Sending the Confirmation Message

Just as we did for our Authy client, we create a single instance of the Twilio REST API helper. It will be called twilio_client in this example.

After that, it's straightforward - send an SMS using the Twilio Python helper library to the same number we used in messages.create().

Send a registration success SMS from the TwilioServices class

import account_verification_flask.utilities
from account_verification_flask.utilities.settings import TwilioSettings
from twilio.rest import Client


class TwilioServices:
    twilio_client = None

    def __init__(self):
        if TwilioServices.twilio_client == None:
            TwilioServices.twilio_client = Client(TwilioSettings.account_sid(), TwilioSettings.auth_token())

    def send_registration_success_sms(self, to_number):
        message = TwilioServices.twilio_client.messages.create(
            body=account_verification_flask.utilities.Signup_Complete,
            to=to_number,
            from_=TwilioSettings.phone_number())

account_verification_flask/services/twilio_services.py

Send a registration success SMS from the TwilioServices class

account_verification_flask/services/twilio_services.py

Congratulations! You've successfully verified new user accounts with Authy. Where can we take it from here?

Now you're an expert on Authy. Where to next?

Where to Next?

In one simple tutorial, we've implemented account verification with Authy and Twilio, allowing your users to confirm accounts with their phone number! Now it's on you - let us know what you build on Twitter, and check out these other tutorials:

Appointment Reminders

Use Twilio to automate the process of reaching out to your customers in advance of an upcoming appointment.

Two-Factor Authentication with Authy

Use Twilio and Twilio-powered Authy OneTouch to implement two-factor authentication (2FA) in your web app.

Contributors:

Need some help?

We all do sometimes; code is hard. Get help now from our support team, or lean on the wisdom of the crowd browsing the Twilio tag on Stack Overflow.

Initialize Flask application
Configure your application with Twilio and Authy
User model with DB configuration and model methods for Flask-Login
User registration form
The registration view route
Verify a user's code and send a success SMS
Re-send a verification code
Send Authy token via SMS
Verify a user's token with AuthyServices
Send a registration success SMS from the TwilioServices class

from flask import Flask
from flask.ext.login import LoginManager
from flask.ext.sqlalchemy import SQLAlchemy
from flask.ext.bcrypt import Bcrypt
from account_verification_flask.config import config_env_files

db = SQLAlchemy()
bcrypt = Bcrypt()
login_manager = LoginManager()


def create_app(config_name='development', p_db=db, p_bcrypt=bcrypt, p_login_manager=login_manager):
    new_app = Flask(__name__)
    new_app.config.from_object(config_env_files[config_name])

    p_db.init_app(new_app)
    p_bcrypt.init_app(new_app)
    p_login_manager.init_app(new_app)
    p_login_manager.login_view = 'register'
    return new_app


app = create_app()

import account_verification_flask.views

class DefaultConfig(object):
    SECRET_KEY = '%^!@@*!&$8xdfdirunb52438#(&^874@#^&*($@*(@&^@)(&*)Y_)((+'
    SQLALCHEMY_DATABASE_URI = 'sqlite://'


class DevelopmentConfig(DefaultConfig):
    AUTHY_KEY = 'your_authy_key'

    TWILIO_ACCOUNT_SID = 'your_twilio_account_sid'
    TWILIO_AUTH_TOKEN = 'your_twilio_auth_token'
    TWILIO_NUMBER = 'your_twilio_phone_number'

    SQLALCHEMY_DATABASE_URI = 'sqlite://'
    DEBUG = True


class TestConfig(DefaultConfig):
    SQLALCHEMY_ECHO = True

    DEBUG = True
    TESTING = True
    WTF_CSRF_ENABLED = False


config_env_files = {
    'test': 'account_verification_flask.config.TestConfig',
    'development': 'account_verification_flask.config.DevelopmentConfig',
}

# from flask.ext.login import UserMixin
from account_verification_flask import db, bcrypt


class User(db.Model):
    __tablename__ = "users"

    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String, nullable=False)
    email = db.Column(db.String, nullable=False)
    password = db.Column(db.String)
    phone_number = db.Column(db.String, nullable=False)
    country_code = db.Column(db.String, nullable=False)
    phone_number_confirmed = db.Column(db.Boolean, nullable=False, default=False)
    authy_user_id = db.Column(db.String, nullable=True)

    def __init__(self, name, email, password, phone_number, country_code):
        self.name = name
        self.email = email
        self.password = bcrypt.generate_password_hash(password)
        self.phone_number = phone_number
        self.country_code = country_code
        self.phone_number_confirmed = False

    def is_authenticated(self):
        return True

    def is_active(self):
        return True

    def is_anonymous(self):
        return False

    def get_id(self):
        return unicode(self.id)

    def __unicode__(self):
        return self.name

    def __repr__(self):
        return '<User %r>' % (self.name)

{% extends "layout.html" %}

{% block content %}

<h1>We're going to be *BEST* friends</h1>
<p> Thanks for your interest in signing up! Can you tell us a bit about yourself?</p>


<form method="POST" class="form-horizontal" role="form">
    {% from "_formhelpers.html" import render_errors, render_field %}
    {{ form.csrf_token }}
    {{ render_errors(form) }}
    <hr/>

    {{ render_field(form.name, placeholder='Anakin Skywalker') }}
    {{ render_field(form.email, placeholder='darth@vader.com') }}
    {{ render_field(form.password) }}
    {{ render_field(form.country_code, id="authy-countries" ) }}
    {{ render_field(form.phone_number , type='number') }}

    <div class="form-group">
        <div class="col-md-offset-2 col-md-10">
            <input type="submit" class="btn btn-primary" value="Sign Up" />
        </div>
    </div>
</form>

{% endblock %}

from datetime import datetime
from flask import session, request, flash, url_for, abort, g
from flask.ext.login import login_user, logout_user, current_user, login_required
from account_verification_flask import app, db, login_manager
from account_verification_flask.forms.forms import RegisterForm, ResendCodeForm, VerifyCodeForm
from  account_verification_flask.models.models import User
from account_verification_flask.services.authy_services import AuthyServices
from account_verification_flask.services.twilio_services import TwilioServices
from account_verification_flask.utilities.view_helpers import *
import account_verification_flask.utilities


@app.route('/')
@app.route('/home')
def home():
    return view('index')


@app.route('/register', methods=["GET", "POST"])
def register():
    form = RegisterForm()
    if request.method == 'POST':
        if form.validate_on_submit():

            if User.query.filter(User.email == form.email.data).count() > 0:
                form.email.errors.append(account_verification_flask.utilities.User_Email_Already_In_Use)
                return view('register', form)

            user = User(
                name=form.name.data,
                email=form.email.data,
                password=form.password.data,
                country_code=form.country_code.data,
                phone_number=form.phone_number.data
            )
            db.session.add(user)
            db.session.commit()

            authy_services = AuthyServices()
            if authy_services.request_phone_confirmation_code(user):
                db.session.commit()
                flash(account_verification_flask.utilities.Verification_Code_Sent)
                return redirect_to('verify', email=form.email.data)

            form.email.errors.append(account_verification_flask.utilities.Verification_Code_Not_Sent)

        else:
            return view('register', form)

    return view('register', form)


@app.route('/verify', methods=["GET", "POST"])
@app.route('/verify/<email>', methods=["GET"])
def verify():
    form = VerifyCodeForm()
    if request.method == 'POST':
        if form.validate_on_submit():
            user = User.query.filter(User.email == form.email.data).first()

            if user == None:
                form.email.errors.append(account_verification_flask.utilities.User_Not_Found_For_Given_Email)
                return view('verify_registration_code', form)

            if user.phone_number_confirmed:
                form.email.errors.append(User_Already_Confirmed)
                return view('verify_registration_code', form)

            authy_services = AuthyServices()
            if authy_services.confirm_phone_number(user, form.verification_code.data):
                user.phone_number_confirmed = True
                db.session.commit()
                login_user(user, remember=True)
                twilio_services = TwilioServices()
                twilio_services.send_registration_success_sms("+{0}{1}".format(user.country_code, user.phone_number))
                return redirect_to('status')
            else:
                form.email.errors.append(account_verification_flask.utilities.Verification_Unsuccessful)
                return view('verify_registration_code', form)
    else:
        form.email.data = request.args.get('email')
    return view('verify_registration_code', form)


@app.route('/resend', methods=["GET", "POST"])
@app.route('/resend/<email>', methods=["GET"])
def resend(email=""):
    form = ResendCodeForm()

    if request.method == 'POST':
        if form.validate_on_submit():
            user = User.query.filter(User.email == form.email.data).first()

            if user == None:
                form.email.errors.append(account_verification_flask.utilities.User_Not_Found_For_Given_Email)
                return view('resend_confirmation_code', form)

            if user.phone_number_confirmed:
                form.email.errors.append(account_verification_flask.utilities.User_Already_Confirmed)
                return view('resend_confirmation_code', form)
            authy_services = AuthyServices()
            if authy_services.request_phone_confirmation_code(user):
                flash(account_verification_flask.utilities.Verification_Code_Resent)
                return redirect_to('verify', email=form.email.data)
            else:
                form.email.errors.append(account_verification_flask.utilities.Verification_Code_Not_Sent)
    else:
        form.email.data = email

    return view('resend_confirmation_code', form)


@app.route('/status')
def status():
    return view('status')


@app.route('/logout', methods=["POST"])
def logout():
    logout_user()
    return redirect_to('home')


# controller utils
@app.before_request
def before_request():
    g.user = current_user


@login_manager.user_loader
def load_user(id):
    try:
        return User.query.get(id)
    except:
        return None

from datetime import datetime
from flask import session, request, flash, url_for, abort, g
from flask.ext.login import login_user, logout_user, current_user, login_required
from account_verification_flask import app, db, login_manager
from account_verification_flask.forms.forms import RegisterForm, ResendCodeForm, VerifyCodeForm
from  account_verification_flask.models.models import User
from account_verification_flask.services.authy_services import AuthyServices
from account_verification_flask.services.twilio_services import TwilioServices
from account_verification_flask.utilities.view_helpers import *
import account_verification_flask.utilities


@app.route('/')
@app.route('/home')
def home():
    return view('index')


@app.route('/register', methods=["GET", "POST"])
def register():
    form = RegisterForm()
    if request.method == 'POST':
        if form.validate_on_submit():

            if User.query.filter(User.email == form.email.data).count() > 0:
                form.email.errors.append(account_verification_flask.utilities.User_Email_Already_In_Use)
                return view('register', form)

            user = User(
                name=form.name.data,
                email=form.email.data,
                password=form.password.data,
                country_code=form.country_code.data,
                phone_number=form.phone_number.data
            )
            db.session.add(user)
            db.session.commit()

            authy_services = AuthyServices()
            if authy_services.request_phone_confirmation_code(user):
                db.session.commit()
                flash(account_verification_flask.utilities.Verification_Code_Sent)
                return redirect_to('verify', email=form.email.data)

            form.email.errors.append(account_verification_flask.utilities.Verification_Code_Not_Sent)

        else:
            return view('register', form)

    return view('register', form)


@app.route('/verify', methods=["GET", "POST"])
@app.route('/verify/<email>', methods=["GET"])
def verify():
    form = VerifyCodeForm()
    if request.method == 'POST':
        if form.validate_on_submit():
            user = User.query.filter(User.email == form.email.data).first()

            if user == None:
                form.email.errors.append(account_verification_flask.utilities.User_Not_Found_For_Given_Email)
                return view('verify_registration_code', form)

            if user.phone_number_confirmed:
                form.email.errors.append(User_Already_Confirmed)
                return view('verify_registration_code', form)

            authy_services = AuthyServices()
            if authy_services.confirm_phone_number(user, form.verification_code.data):
                user.phone_number_confirmed = True
                db.session.commit()
                login_user(user, remember=True)
                twilio_services = TwilioServices()
                twilio_services.send_registration_success_sms("+{0}{1}".format(user.country_code, user.phone_number))
                return redirect_to('status')
            else:
                form.email.errors.append(account_verification_flask.utilities.Verification_Unsuccessful)
                return view('verify_registration_code', form)
    else:
        form.email.data = request.args.get('email')
    return view('verify_registration_code', form)


@app.route('/resend', methods=["GET", "POST"])
@app.route('/resend/<email>', methods=["GET"])
def resend(email=""):
    form = ResendCodeForm()

    if request.method == 'POST':
        if form.validate_on_submit():
            user = User.query.filter(User.email == form.email.data).first()

            if user == None:
                form.email.errors.append(account_verification_flask.utilities.User_Not_Found_For_Given_Email)
                return view('resend_confirmation_code', form)

            if user.phone_number_confirmed:
                form.email.errors.append(account_verification_flask.utilities.User_Already_Confirmed)
                return view('resend_confirmation_code', form)
            authy_services = AuthyServices()
            if authy_services.request_phone_confirmation_code(user):
                flash(account_verification_flask.utilities.Verification_Code_Resent)
                return redirect_to('verify', email=form.email.data)
            else:
                form.email.errors.append(account_verification_flask.utilities.Verification_Code_Not_Sent)
    else:
        form.email.data = email

    return view('resend_confirmation_code', form)


@app.route('/status')
def status():
    return view('status')


@app.route('/logout', methods=["POST"])
def logout():
    logout_user()
    return redirect_to('home')


# controller utils
@app.before_request
def before_request():
    g.user = current_user


@login_manager.user_loader
def load_user(id):
    try:
        return User.query.get(id)
    except:
        return None

from datetime import datetime
from flask import session, request, flash, url_for, abort, g
from flask.ext.login import login_user, logout_user, current_user, login_required
from account_verification_flask import app, db, login_manager
from account_verification_flask.forms.forms import RegisterForm, ResendCodeForm, VerifyCodeForm
from  account_verification_flask.models.models import User
from account_verification_flask.services.authy_services import AuthyServices
from account_verification_flask.services.twilio_services import TwilioServices
from account_verification_flask.utilities.view_helpers import *
import account_verification_flask.utilities


@app.route('/')
@app.route('/home')
def home():
    return view('index')


@app.route('/register', methods=["GET", "POST"])
def register():
    form = RegisterForm()
    if request.method == 'POST':
        if form.validate_on_submit():

            if User.query.filter(User.email == form.email.data).count() > 0:
                form.email.errors.append(account_verification_flask.utilities.User_Email_Already_In_Use)
                return view('register', form)

            user = User(
                name=form.name.data,
                email=form.email.data,
                password=form.password.data,
                country_code=form.country_code.data,
                phone_number=form.phone_number.data
            )
            db.session.add(user)
            db.session.commit()

            authy_services = AuthyServices()
            if authy_services.request_phone_confirmation_code(user):
                db.session.commit()
                flash(account_verification_flask.utilities.Verification_Code_Sent)
                return redirect_to('verify', email=form.email.data)

            form.email.errors.append(account_verification_flask.utilities.Verification_Code_Not_Sent)

        else:
            return view('register', form)

    return view('register', form)


@app.route('/verify', methods=["GET", "POST"])
@app.route('/verify/<email>', methods=["GET"])
def verify():
    form = VerifyCodeForm()
    if request.method == 'POST':
        if form.validate_on_submit():
            user = User.query.filter(User.email == form.email.data).first()

            if user == None:
                form.email.errors.append(account_verification_flask.utilities.User_Not_Found_For_Given_Email)
                return view('verify_registration_code', form)

            if user.phone_number_confirmed:
                form.email.errors.append(User_Already_Confirmed)
                return view('verify_registration_code', form)

            authy_services = AuthyServices()
            if authy_services.confirm_phone_number(user, form.verification_code.data):
                user.phone_number_confirmed = True
                db.session.commit()
                login_user(user, remember=True)
                twilio_services = TwilioServices()
                twilio_services.send_registration_success_sms("+{0}{1}".format(user.country_code, user.phone_number))
                return redirect_to('status')
            else:
                form.email.errors.append(account_verification_flask.utilities.Verification_Unsuccessful)
                return view('verify_registration_code', form)
    else:
        form.email.data = request.args.get('email')
    return view('verify_registration_code', form)


@app.route('/resend', methods=["GET", "POST"])
@app.route('/resend/<email>', methods=["GET"])
def resend(email=""):
    form = ResendCodeForm()

    if request.method == 'POST':
        if form.validate_on_submit():
            user = User.query.filter(User.email == form.email.data).first()

            if user == None:
                form.email.errors.append(account_verification_flask.utilities.User_Not_Found_For_Given_Email)
                return view('resend_confirmation_code', form)

            if user.phone_number_confirmed:
                form.email.errors.append(account_verification_flask.utilities.User_Already_Confirmed)
                return view('resend_confirmation_code', form)
            authy_services = AuthyServices()
            if authy_services.request_phone_confirmation_code(user):
                flash(account_verification_flask.utilities.Verification_Code_Resent)
                return redirect_to('verify', email=form.email.data)
            else:
                form.email.errors.append(account_verification_flask.utilities.Verification_Code_Not_Sent)
    else:
        form.email.data = email

    return view('resend_confirmation_code', form)


@app.route('/status')
def status():
    return view('status')


@app.route('/logout', methods=["POST"])
def logout():
    logout_user()
    return redirect_to('home')


# controller utils
@app.before_request
def before_request():
    g.user = current_user


@login_manager.user_loader
def load_user(id):
    try:
        return User.query.get(id)
    except:
        return None

import account_verification_flask.utilities
from account_verification_flask.utilities.settings import AuthySettings
from authy.api import AuthyApiClient


class AuthyServices:
    authy_client = None

    def __init__(self):
        if AuthyServices.authy_client == None:
            AuthyServices.authy_client = AuthyApiClient(AuthySettings.key())

    def request_phone_confirmation_code(self, user):
        if user == None:
            raise ValueError(account_verification_flask.utilities.User_Id_Not_Found)

        if user.authy_user_id == None:
            self._register_user_under_authy(user)

        sms = AuthyServices.authy_client.users.request_sms(user.authy_user_id, {'force': True})
        return not sms.ignored()

    def confirm_phone_number(self, user, verification_code):
        if user == None:
            raise ValueError(account_verification_flask.utilities.User_Id_Not_Found)

        verification = AuthyServices.authy_client.tokens.verify(user.authy_user_id, verification_code)
        return verification.ok()

    def _register_user_under_authy(self, user):
        authy_user = AuthyServices.authy_client.users.create(user.email, user.phone_number, user.country_code)
        if authy_user.ok:
            user.authy_user_id = authy_user.id

import account_verification_flask.utilities
from account_verification_flask.utilities.settings import AuthySettings
from authy.api import AuthyApiClient


class AuthyServices:
    authy_client = None

    def __init__(self):
        if AuthyServices.authy_client == None:
            AuthyServices.authy_client = AuthyApiClient(AuthySettings.key())

    def request_phone_confirmation_code(self, user):
        if user == None:
            raise ValueError(account_verification_flask.utilities.User_Id_Not_Found)

        if user.authy_user_id == None:
            self._register_user_under_authy(user)

        sms = AuthyServices.authy_client.users.request_sms(user.authy_user_id, {'force': True})
        return not sms.ignored()

    def confirm_phone_number(self, user, verification_code):
        if user == None:
            raise ValueError(account_verification_flask.utilities.User_Id_Not_Found)

        verification = AuthyServices.authy_client.tokens.verify(user.authy_user_id, verification_code)
        return verification.ok()

    def _register_user_under_authy(self, user):
        authy_user = AuthyServices.authy_client.users.create(user.email, user.phone_number, user.country_code)
        if authy_user.ok:
            user.authy_user_id = authy_user.id

import account_verification_flask.utilities
from account_verification_flask.utilities.settings import TwilioSettings
from twilio.rest import Client


class TwilioServices:
    twilio_client = None

    def __init__(self):
        if TwilioServices.twilio_client == None:
            TwilioServices.twilio_client = Client(TwilioSettings.account_sid(), TwilioSettings.auth_token())

    def send_registration_success_sms(self, to_number):
        message = TwilioServices.twilio_client.messages.create(
            body=account_verification_flask.utilities.Signup_Complete,
            to=to_number,
            from_=TwilioSettings.phone_number())

Account Verification with Authy, Python and Flask

Thank you for your feedback!

Initialize Flask application

Configure your application with Twilio and Authy

User model with DB configuration and model methods for Flask-Login

User registration form

The registration view route

Verify a user's code and send a success SMS

Re-send a verification code

Send Authy token via SMS

Verify a user's token with AuthyServices

Send a registration success SMS from the TwilioServices class

Need some help?