Earn 13,500 ($135.00)

Description: I've been developing an app on Replit for a few weeks and ran into a perplexing issue with Google authentication. In development, everything works perfectly, but in production an existing Google user completes authentication and then gets stuck instead of being redirected back to the app. New Google users seem to register and log in without issues.

I've spent several days troubleshooting with my agent but haven't been able to pinpoint the problem. I'm looking for an experienced developer who can diagnose why production behaves differently and resolve the redirect issue for existing Google users.

Deliverables:

A stable Google authentication flow in production where both new and existing Google users are correctly redirected to the app

A written summary of the root cause and the steps taken to solve the issue