What is Keycloak? Tell me what you have encountered.

Keycloak is an open-source platform for authentication and authorization management, providing ready-made solutions for Single Sign-On (SSO), user management, roles, and access policies.

Keycloak's main features:

• Support for OAuth2, OpenID Connect, SAML protocols.
• Centralized management of users and groups.
• Social login via Google, Facebook, etc.
• Multi-factor authentication.
• Integration with LDAP and Active Directory.

In my practice, Keycloak was used to ensure single sign-on across multiple microservices, configure roles and access rights, and integrate with external identity providers. For example, I configured Keycloak adapters for Spring Boot applications to automatically verify tokens and manage user sessions.