Nico implemented dependency injection for secret management in the aau-giraf/foodplanner-api repository, focusing on enhancing testability and modularity within the backend. By refactoring the secret loader to use dependency injection, Nico enabled centralized and flexible secret handling across controllers and services, paving the way for future integration with sources like Vault or environment variables. The work involved updating the API’s architecture in C# and strengthening the unit testing suite by making the secret loader mockable. Over the course of one month, Nico delivered a foundational feature that improved maintainability and prepared the codebase for scalable, environment-specific configuration management.