Handle responses with no `choices` in `CreateResponse`

[f-lombardo]

CreateResponse class should handle here

client/src/Responses/Chat/CreateResponse.php

Line 50 in 199d237

), $attributes['choices']);

cases when response attributes has no 'choices' element. That could happen when using this library trying to connect to Mistral API, and we exceed the API rate limit. In that case $attributes will contain

[
 "message" => "Requests rate limit exceeded"
]

Maybe it would be OK just to throw an exception with some hints on the received response

[iBotPeaches]

That error suggests you didn't get any of the payload, just an error. Could I get a sample of full payload including http status?

[f-lombardo]

The HTTP code is 429, the response is:

{"message":"Requests rate limit exceeded"}

[iBotPeaches]

Okay I believe this PR will solve your issue - #553 as it'll detect the 429 and fail accordingly. The only difference is Mistral error structure probably doesn't match the OpenAI expectation.