2020
https://www.infoq.com/presentations/spring-security-oauth-2/
2018
Grandja - Next Generation OAuth Support with Spring Security 5
    https://www.youtube.com/watch?v=llNQDoOzrtY
    https://github.com/jgrandja/oauth2-client-demo/
SpringDeveloper - Securing OAuth 2.0 Resources in Spring Security 5.0
    https://www.youtube.com/watch?v=1N-xwmoN83w
2017
TechPrimers - Spring Security using OAuth2 in Spring Boot
    https://www.youtube.com/watch?v=Dbxzw0cpxBU
    https://github.com/TechPrimers/spring-security-oauth-example
    https://github.com/TechPrimers/spring-security-oauth-example/blob/master/spring-security-client/src/main/java/com/techprimers/security/springsecurityclient/config/OauthConfig.java
RocketMan - Secure REST API with authentication using Spring Boot , Security , OAuth2 and JPA.
    https://www.youtube.com/watch?v=0pD7YeTAUkk