Integrating VoiceFlow Bot into FlutterFlow - Returning NULL Value

Question

I am trying to integrate my VoiceFlow Bot into FlutterFlow. In FlutterFlow backend the API call is working properly.

On the front end, when I initiate the chat and enter a query, the bot returns with "NULL".

I believe I have the following issues:

1. Improper Launch request to initiate the chat upon page load

2. Possible error in JSON custom code return

• return json.decode('{"payLoad": "userID", "content": "$prompt"}');

3. Possible error in JSON paths

• $[:].payload.message
• $[:].payload.slate.id
• $[:].type

Any help would be much appreciated!

I have tried the above code to rectify.