SpringBoot Anonymous requests to the token endpoint are redirected to the Spring Security login page instead of receiving a 401 response

Fixes an issue where auto-configuration for Spring Authorization Server was overriding the default exception handling (AuthenticationEntryPoint) resulting in anonymous requests to the token endpoint being redirected to the Spring Security login page instead of returning 401 Unauthorized.

Auto-configuration now registers a defaultAuthenticationEntryPointFor that is added to any other entry points already configured.

See gh-34003

Comment From: mhalbritter

Thanks!

Comment From: sjohnr

Thanks for the quick merge!