Raju developed a unified user authentication and API key management system for the openai/codex repository, focusing on consolidating and securing access across multiple deployment environments. Leveraging Node.js, Express.js, and OAuth with OpenID Connect, Raju implemented an OIDC-based API key retrieval process and a CLI sign-in flow that supports both ChatGPT and existing API keys. The solution introduced environment-aware authorization endpoint configuration, enabling seamless adaptation to different deployment contexts. This work reduced operational overhead and improved security for developers and downstream systems. The depth of the implementation addressed both developer experience and business goals around onboarding and integration efficiency.