AssertionError - not giving voice_id causes 500 in api

[sentry-io]

Sentry Issue: STUDIO-BACKEND-J5

AssertionError: 
(7 additional frame(s) were not displayed)
...
  File "rest_api/baseview.py", line 16, in dispatch
    return await super().dispatch(request, *args, **kwargs)
  File "rest_api/samples.py", line 271, in list_xtts
    speaker_or_voice = await get_speaker_or_xtts_voice(request.user, voice_id)
  File "concurrent/futures/thread.py", line 58, in run
    result = self.fn(*self.args, **self.kwargs)
  File "rest_api/samples.py", line 192, in get_speaker_or_xtts_voice
    assert voice_id

To simulate to not give voice_id
Api docs state voice_id is required but examples do not generate it causing confusion on user.

curl --request GET
--url 'https://app.coqui.ai/api/v2/samples/xtts/?page=1&per_page=10'
--header 'accept: application/json'
--header 'authorization: Bearer YOUR_TOKEN'

Similarly you need to give a voice_id to render/create_sample ..
curl --request POST
--url https://app.coqui.ai/api/v2/samples/xtts/render/
--header 'accept: application/json'
--header 'authorization: Bearer YOUR_TOKEN'
--header 'content-type: application/json'
--data '
{
"speed": 1,
"text": "hello",
}