Worked on the firebase/firebase-tools repository to deliver a user authentication integration for the App Hosting CLI, focusing on strengthening security and reliability for backend and build operations. Implemented in TypeScript, the solution introduced a unified authentication flow by integrating requireAuth, ensuring Application Default Credentials are consistently fetched and applied across create, delete, get, list, and rollout commands. This approach reduced manual configuration and minimized credential drift, enhancing the overall consistency of authentication for cloud services integration. The encapsulation of authentication logic within the CLI command flow established a robust foundation for future secure features and streamlined developer workflows.