OAuth2AuthorizationRequest is not extendable

[aranoverse]

Describe the bug

OAuth2AuthorizationRequest is not extendable

To Reproduce

the following is declaration of AuthorizationRequestRepository <T extends OAuth2AuthorizationRequest> and OAuth2AuthorizationRequest is final class. it means that we can not create new CustomOAuth2AuthorizationRequest which extends OAuth2AuthorizationRequest

  public interface AuthorizationRequestRepository <T extends OAuth2AuthorizationRequest> 

Expected behavior

OAuth2AuthorizationRequest should not be final class