A lightweight OAuth 2.0 Authorization Server supporting Device Authorization Grant ([RFC 8628](https://datatracker.ietf.org/doc/html/rfc8628)), Authorization Code Flow with PKCE ([RFC 6749](https://datatracker.ietf.org/doc/html/rfc6749) + [RFC 7636](https://datatracker.ietf.org/doc/html/rfc7636)), and Client Credentials Grant for machine-to-machine authentication.