In September 2025, Stéphane Maltaesousa enhanced the camptocamp/c2cgeoportal repository by developing a backend authentication feature that restricts access for deactivated user accounts. Using Python and backend development skills, Stéphane implemented logic to block password changes and login attempts from deactivated users, while ensuring unauthorized access attempts are centrally logged for improved security monitoring and auditability. The solution was designed to maintain backward compatibility by confining changes to backend authentication flows, preserving the existing user-facing experience. This targeted update addressed a specific security need, demonstrating depth in backend system design and a careful approach to access control and traceability.