https://www.keycloak.org/
https://www.baeldung.com/tag/keycloak/

mvn
https://search.maven.org/search?q=a:keycloak-adapter-bom
https://search.maven.org/artifact/org.keycloak.bom/keycloak-adapter-bom/18.0.2/pom
    implementation("org.keycloak.bom:keycloak-adapter-bom:18.0.2")

docker
https://www.keycloak.org/server/containers
docker run -p 8081:8080 -e KEYCLOAK_ADMIN=admin -e KEYCLOAK_ADMIN_PASSWORD=admin quay.io/keycloak/keycloak:17.0.1 start-dev

2023
https://habr.com/ru/post/724738/
https://habr.com/ru/post/720070/
https://habr.com/ru/post/716232/
2022
https://www.baeldung.com/spring-boot-keycloak-integration-testing
2021
https://www.baeldung.com/spring-boot-keycloak
https://www.baeldung.com/java-keycloak-custom-user-providers
https://www.baeldung.com/keycloak-embedded-in-spring-boot-app
    https://github.com/Baeldung/spring-security-oauth/tree/master/oauth-rest/oauth-authorization-server
2020
https://www.baeldung.com/postman-keycloak-endpoints