v1.0.0: Rewritten. Dropped custom claims.

Completely rewritten to optimize code and improve readability. Documented code when needed.
The token stored is simply the access token from the OIDC provider, no more custom wrapped JWT.

THIS HAS BREAKING CHANGES.

0.2.0: Gin Middleware Func

feat: middleware function (#3)

* feat: middleware function

* fix: error not err as a type

* fix: add logging and return

* feat: readme updates