Support asyncio for authenticate_request #137
Description
The authenticate_request may make a sync request to fetch the JWK keys. This request is sync in the fetch_jwks function. This would cause asyncio mainloop to hang in fastapi (or other async) frameworks.
Technically we can pass in VerifyTokenOptions.jwk_key to the authenticate_request function. However, jwk_key is not easy to calculate as we have to download all JWK keys and then use kid (key id) provided as part of the bearer token. We would need to extract kid by decoding the bearer token.