This login activity model establishes a hardened authentication workflow that enforces deterministic validation logic, controlled error handling, and automated account-protection mechanisms. The sequential verification of user identifiers and credentials ensures that only authenticated principals progress through the access-control boundary, while the integrated failure-count subsystem provides rate-limiting and brute-force mitigation through threshold-based account locking. By codifying these operations into a repeatable process flow, the system maintains predictable authentication behavior, supports audit and compliance requirements, and strengthens the overall security posture of the application’s identity management layer.