Fix Missing Authentication Checks in GitHub OAuth Callback

[m20arcusk]

Summary

This PR addresses a critical security vulnerability related to missing authentication checks in the GitHub OAuth callback process. The changes ensure that only authenticated users can proceed after the OAuth process, preventing unauthorized access.

Security Vulnerabilities Fixed

• Location: Line 24
  • Issue: Missing authentication checks in the GitHub OAuth callback.
  • Fix: Added a check to ensure the user is authenticated before proceeding.

Changes Made

• Added a check to verify that the user is authenticated after the GitHub OAuth process.
• Redirected authenticated users to a secure dashboard page.

Testing Recommendations

• Test login with valid credentials to ensure successful authentication.
• Test login with invalid credentials to verify error handling.
• Test GitHub OAuth flow to ensure only authenticated users are redirected.
• Attempt to access the callback URL directly to ensure unauthorized access is prevented.

Potential Shortcomings

• None identified.

Security Impact

• Before: Potential unauthorized access due to missing authentication checks.
• After: Proper authentication checks ensure only authorized users can access sensitive areas.

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Auto-generated security fix | Fixed 1 vulnerabilities with code changes | Please review carefully before merging