Oauth2 - Baeldung Guides

https://habr.com/ru/company/otus/blog/453664/
OR
@SpringBootApplication
@EnableAuthorizationServer
@EnableResourceServer
@RestController
public class WebsecurityappApplication

AUth Server + REsource Server + 2 Clients (BEST!) Spring Security 5 solution (Spring Boot)
https://github.com/Baeldung/spring-security-oauth/tree/master/oauth-sso

REST access to Keycloak (add new user)
ADD USER
https://issues.redhat.com/browse/KEYCLOAK-5383
https://stackoverflow.com/questions/65416275/how-can-i-create-a-user-with-a-password-in-keycloak-using-the-rest-api
https://stackoverflow.com/questions/52440546/create-user-on-keycloack-from-curl-command
https://www.springcloud.io/post/2022-02/keycloak-manager-api/#gsc.tab=0
+
https://www.appsdeveloperblog.com/keycloak-rest-api-create-a-new-user/#:~:text=To%20create%20a%20new%20user%20account%2C%20you%20will%20need%20to,new%20user%20should%20be%20created.&text=If%20the%20request%20is%20successful%2C%20you%20will%20get,a%20201%20Created%20status%20code.
+
https://russianblogs.com/article/4101365550/
DELETE USER
https://stackoverflow.com/questions/65772984/delete-specific-user-from-keycloak
https://stackoverflow.com/questions/60601560/how-to-delete-keycloak-realm-via-rest-api
ADD/DELETE ROLE:
https://stackoverflow.com/questions/60312517/keycloak-add-remove-realm-role-from-a-user-using-apicalls


Configure Client - Spring Boot OAuth2 Login (Spring Security 5)
https://www.baeldung.com/spring-security-5-oauth2-login
+
OAuth2 Logout on Client
https://www.baeldung.com/logout-spring-security-oauth

Resource server (Spring Security 5) - uses embedded Keycloak Server
https://www.baeldung.com/spring-security-oauth-resource-server
+
Keycloak Embedded in a Spring Boot Application
https://www.baeldung.com/keycloak-embedded-in-spring-boot-app
+
Spring Boot Client uses Keycloak Standalone Server
https://www.baeldung.com/spring-boot-keycloak
No need call Keycloak API to generate Access Token, send Authorization header in request for protected resources.
+
2 Clients using Resource Server and KeyCloak
https://www.baeldung.com/sso-spring-security-oauth2
+


SPring Boot - old and new style (bottom)
https://www.baeldung.com/spring-boot-security-autoconfiguration

Multiple Security Config Files
https://stackoverflow.com/questions/59058596/multiple-websecurityconfigureradapter-in-spring-boot-for-multiple-patterns

Old way (Guides)
https://www.baeldung.com/spring-security-oauth