PKCE Protection In Spring Security Oauth2 authorization server

Hello Viewers I trust you all are doing fine. This video is one of the video my spring security oauth2 series, pls do well to subscribe and turn on the bell icon so when the other upload on the series goes live you'll get notified. In my last upload I talked about how to setup an authorization server using the least possible configuration. But using the Oauth2 authorization code grant flow like that has some security flaws. In this video I'll explaining how to apply what is known as the Proof Key for Code Exchange and how it can be properly employed for proper securing of our Spring OAUTH2 authorization server.