Apple Sign-In

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: ...

Here are the errors repeatedly encountered while uploading multiple Flutter apps to TestFlight. 1. Apple Sign-In Error 1000 SignInWithAppleAuthorizationException(AuthorizationErrorCode.unknown, The operation couldn't be completed. (com.apple.AuthenticationServices.AuthorizationError error 1000.)) Cause This occurs because the Sign in with Apple capability is missing from Runner.entitlements. Solution Both places must be configured. 1. ios/Runner/Runner.entitlements <key>com.apple.developer.applesignin</key> <array> <string>Default</string> </array> 2. Apple Developer Console developer.apple.com -> Identifiers -> Select app Bundle ID -> Check Sign in with Apple -> Save ...