Create a CAS Provider

[nikero41]

Description 📓

I am trying to authenticate using an external CAS server. It would be nice if there was a CAS Provider to help with this.
e.x. next-cas-client

How to reproduce ☕️

Create a CAS server and a minimal Next JS app with next-auth and create a provider to authenticate to the CAS sever

Contributing 🙌🏽

Yes, I am willing to help implement this feature in a PR

[balazsorban44]

As I understand, CAS is a different spec than OAuth, what we currently support. This makes it non-trivial to add support quickly, so I'm moving this to a discussion for now.