Worked on the wxiaoguang/gitea repository to address a critical issue in the authentication system, specifically improving the visibility of the SSPI sign-in option when it is the only enabled authentication method. Focused on backend development using Go, the work involved refining the logic that determines which authentication methods are displayed, ensuring SSPI is consistently considered alongside OAuth2 and OpenID options. Updated and expanded automated tests to cover SSPI-only scenarios, reducing the risk of future regressions. This fix enhanced the enterprise sign-in experience for Windows-based deployments, streamlining user authentication and decreasing potential confusion for end users.