The authentication system's UML class diagram outlines class relationships like user, authentication provider, role, permission, session, audit log, and password reset token. The diagram shows how a user links to roles and permissions, manages sessions, and logs activities. Likewise, it depicts what is known as password reset tokens management and how authentication providers validate users. The interactions between classes make up the heart of the authentication mechanism within a typical software system. It ensures that only authenticated users get access to the system.
