17500: Missing sourceId or mediaUrl

Twilio could not create a new transcription because the request omitted both the sourceId and mediaUrl parameters.

When you request a transcription, you must supply one of the following:

• sourceId: A valid Recording SID (prefix RE).
• mediaUrl: A publicly accessible URL that points to the audio file.

The request body doesn't include sourceId or mediaUrl.

• Add a sourceId that contains a valid Recording SID (prefix RE).
• Add a mediaUrl that references the audio file you want to transcribe.

• Transcription API