Oauth2 spnego kerberos example

Expected Behavior
I don't find any example with oauth2 and kerberos. There is example for casual security and kerberos https://github.com/spring-projects/spring-security-kerberos/tree/main/spring-security-kerberos-samples/sec-server-spnego-form-auth. There is any way to EASY implement oauth2 and kerberos auth with AD?

Current Behavior

Don't find any example , Spring gateway, Oauth2 , Spring authorization server, Some back service

Context
I implemented some example, it works correct. but it injects directlry in logic Spring and not for normal using.
I spent one month on verge oauth2 and security and authorization server.
My tricky example https://github.com/robertmakrytski/spring_kerberous_spinego_auth2, the master contains like i think it can configurate

Some log and video

https://github.com/user-attachments/assets/b23bd72e-3866-4ca1-a5ac-ad83af89c7be

account.log

Start by reviewing the existing spring-security-kerberos-samples/sec-server-spnego-form-auth example and the supplied spring_kerberous_spinego_auth2 repository. Determine the supported scope for an OAuth2, Kerberos, gateway, authorization-server, and backend example, then document or add a maintainable example whose configuration and usage are clear.