https://docs.spring.io/spring-security-oauth2-boot/docs/current/reference/htmlsingle

https://docs.spring.io/spring-security-oauth2-boot/docs/current/reference/htmlsingle/#boot-features-security-custom-user-info-client
https://docs.spring.io/spring-security-oauth2-boot/docs/current/reference/htmlsingle/#boot-features-security-oauth2-single-sign-on