Developed a generic OpenID Connect authentication provider for the lnbits/lnbits repository, enabling seamless integration with a wide range of OIDC-compatible identity providers. The implementation focused on backend development using Python and FastAPI, with an emphasis on robust API integration and configuration management. The solution introduced branding customization options and included comprehensive setup documentation to streamline partner onboarding. By standardizing authentication flows, the work improved security and interoperability while reducing the need for custom authentication solutions. This feature accelerated partner integrations and provided a reusable, configurable authentication provider, ultimately decreasing development overhead and supporting flexible user authentication across multiple platforms.