Support for using JWT "sub" claim as query argument + OAuth token introspection

[igmagollo]

Hi everybody,

I've been exploring the authentication capabilities and noticed a couple of things:

1. Using the sub claim from JWTs as arguments:
   I couldn’t find a way to reference the sub (subject) claim from a JWT as an argument in other calls. This is a very common pattern in API gateways, where many queries don’t explicitly take a user ID as an argument because it's already available in the auth token. Is there a way to do this currently, or is it planned?

2. OAuth support and token introspection:
   I also didn’t see support for OAuth-based flows or token introspection. While JWKS helps with verifying tokens, there are scenarios where we need to introspect tokens (mainly to check revocation). Is OAuth support or token introspection planned for a future release?