Same params as:
https://platform.openai.com/docs/api-reference/audio/createSpeech
POST /audio/speech HTTP/1.1 Host: Ocp-Apim-Subscription-Key: YOUR_API_KEY Accept: */*
Successful Response
No content
POST /v1/audio/speech HTTP/1.1 Host: Ocp-Apim-Subscription-Key: YOUR_API_KEY Accept: */*