Describe the bug

After Hydra startup log warns about configuration key deprecation. There is no records in documentation reference (https://www.ory.sh/hydra/docs/reference/configuration/) about oidc.subject_identifiers.supported_types.

Reproducing the bug

Steps to reproduce the behavior:

Start Hydra Hydra v1.9.0-alpha.2 with oidc.subject_identifiers.enabled set to public

_Se

go-jwt seems to not be maintained really. It has open/known security issue (which have multiple PRs open to address, earliest in 2018: dgrijalva/jwt-go#286). And it requires numbers to be floats because it cannot validate ints. [PR to fix this has been made](https://github.com/dgrijalva

I need to do a collateral call to google APIs from my backend to get additional information about the user (full name, profile picture, team, ...). For that, I need to have the access token. Unfortunately, now I only have access to the user's email.

A solution could be to return the access token in the header key X-Forwarded-AccessToken but I think we will have to manage when the access token