When authenticating using OIDC some IDPs send additional fields in their
authorization response.
This leads to an error because these fields can't be persisted to the DB
through the auth.js prisma adapter.
This PR solves this by deleting all unrecognized fields from the
authorization response before persisting.
This behaviour is also compliant to
[RFC6749 Section 4.1.2](https://datatracker.ietf.org/doc/html/rfc6749#section-4.1.2)
