Spring OAuth2.0 관련 링크

OAuth2.0 
https://datatracker.ietf.org/doc/html/rfc6749

Spring Security Documents
https://docs.spring.io/spring-security/reference/servlet/getting-started.html

Spring Authorization Server Reference
https://docs.spring.io/spring-authorization-server/docs/current/reference/html/index.html

Spring Security - Github
https://github.com/spring-projects/spring-security
https://github.com/spring-projects/spring-security/tree/main/oauth2