Can you explain what Keycloak is and what it is used for?

Keycloak is an open-source platform for managing user authentication and authorization. It allows centralized management of application login, supports features such as Single Sign-On, social login through Google, Facebook, and others, as well as role and access rights management.

Keycloak is used to simplify application security, freeing developers from the need to implement complex authentication and authorization mechanisms themselves. This is especially useful in microservices architecture and when working with web applications and mobile clients.