Developed a security-focused enhancement for the camptocamp/c2cgeoportal repository by implementing deactivated account access control within the backend authentication flow. This feature, built using Python and backend development best practices, prevents deactivated users from logging in or changing passwords while ensuring unauthorized access attempts are centrally logged for improved auditability. The approach maintained backward compatibility by isolating changes to backend logic, preserving the existing user-facing experience. By reinforcing access governance and introducing robust logging, the work addressed a critical security requirement without disrupting normal operations, demonstrating a methodical approach to authentication system improvements and secure access management in production environments.