Thanks!

Oh, it's already. I just haven't updated the article with a link. Here is a link to it -https://wkrzywiec.medium.com/implementing-oauth-2-0-access-token-validation-with-spring-security-64c797b42b36

And the link to the last one ;) https://medium.com/@wkrzywiec/step-by-step-guide-how-integrate-keycloak-with-angular-application-d96b05f7dfdd