Implement support for OAuth2 with automatic credentials renewal.
We will use oauthlib. Its development is ongoing and backed by a complete community. It is also supporting request and httpx. The later is quite interesting as we would want to support it too at some point.
The other possibility is requests-oauthlib, but it seems stuck in 2020 and does only support requests.
Both are lacking of mTLS support. NXPY-211 will be tackled to workaround that restriction.