I'm trying to call the speech API. The docs say I can use either a Ocp-Apim-Subscription-Key header containing my subscription key directly, or I can request an access token with a call to https://<REGION_IDENTIFIER>.api.cognitive.microsoft.com/sts/v1.0/issueToken, to obtain a JWT that I can then include in subsequent requests in an Authorization: Bearer <token> header. However, neither works. I can successfully obtain an access token (which I assume means that my key is correct), but then calls to the API endpoint using either authentication mechanism are rejected with a 401 error and no other info (content length of the response is 0). I am using the same region identifier for both calls. Is there something else I have to do?



