[FEAT] Improve error feedback when GitHub authentication fails

[tharunika-19]

Description

When GitHub authentication fails, users are redirected back to the sign-in page, but there is no clear explanation of what went wrong.

This can be confusing for users and contributors, especially during local setup and OAuth configuration.

Steps to Reproduce

1. Open the sign-in page.
2. Trigger a GitHub authentication failure.
3. Observe the page after redirect.

Current Behavior

• User is redirected back to the sign-in page.
• No descriptive error message is displayed.
• The reason for the failure is unclear.

Expected Behavior

• Display a user-friendly error message.
• Explain that GitHub authentication failed.
• Provide guidance on possible next steps.

Suggested Fix

• Detect authentication failures.
• Display an inline error banner or alert.
• Show a clear message explaining the failure.

Impact

Improves user experience and makes authentication issues easier to understand and troubleshoot.

[tharunika-19]

Hi @Priyanshu-byte-coder ! After investigating further, I believe this behavior is related to local OAuth configuration rather than a product bug.

The authentication failure occurred because the required GitHub OAuth credentials and environment variables were not fully configured during local setup. Once the project is configured correctly, the sign-in flow should work as expected.

Since this does not appear to be an issue with the application itself, I'm closing this issue. If anyone can reproduce the behavior with a correctly configured setup, please feel free to reopen it with additional details.

[ishwarc04]

hi @Priyanshu-byte-coder ,I would like to work on this as part of GSSoC 2026. Can you please assign it to me

[github-actions]

Assigned to @ishwarc04! You have 7 days to open a PR. No PR after 7 days = auto-unassigned so others can pick it up. Good luck!