- Add usernameExpression property with SpEL evaluation support
- Auto-convert userNameAttributeName to SpEL for backward compatibility
- Use SimpleEvaluationContext for secure expression evaluation
- Pass evaluated username to OAuth2UserAuthority for spring-projectsgh-15012 compatibility
- Add Builder pattern to DefaultOAuth2User
- Add Builder pattern to OAuth2UserAuthority
- Add Builder pattern to OidcUserAuthority with inherance support
- Support nested property access (e.g., "data.username")
- Add usernameExpression property to ClientRegistration documentation
- Update What's New section
Fixes gh-16390
Signed-off-by: yybmion <yunyubin54@gmail.com>
0ca4bfdc1f