OAuth

Apple Sign-In was failing with 403 Forbidden while Google Sign-In worked perfectly fine. Since Apple login worked correctly in another project using the same stack (Rails 8 + Flutter), I did a comparative analysis. Symptoms Apple login: 403 Forbidden Google login: works fine Error message: "Email not verified by Apple" Cause 1: email_verified Type Mismatch (Core Issue) Apple and Google return the email_verified field in JWT with different types. Provider email_verified type Example value Google boolean true Apple string or boolean "true" or true The problematic code: ...

After uploading a test build of the app and running it myself, 4 things broke simultaneously. Google login failure, AI itinerary generation returning wrong results, app crash on tapping the notification button, and the popular destinations section completely empty. Here is the process of finding and fixing each cause. 1. Google SSO Fails While Apple Login Succeeds Symptoms Apple Sign-In works normally but Google Sign-In returns a 500 error. The client only shows a login failure toast. ...