Json api, HTTP request


I collect user input with a Chatfuel bot and send it to [flowxo.com ] via the JSON API. Flowxo does some calculations using a Google Sheet and returns a value, which I want to send back to Chatfuel and show to the user.
But when the flowxo send “result” to chatfuel, the flowxo show : bot user not found

Can anyone help me plzzzz TT