Facebook Auth With Firebase

[jakubmichalski]

Can we access your project?

• I give permission for members of the FlutterFlow team to access and test my project for the sole purpose of investigating this issue.

Current Behavior

I attempt to integrate Facebook login following official instruction.
I've already working Apple and Google login.

Reproducible on real devices and simulators (iOS and Android).
Reproducible on deployed version (via TestFlight) and local run.

Current behaviour:

1. User clicks on "Facebook login" button which executes "Log In" action in FlutterFlow with auth provider Facebook.
2. User provides Facebook credentials clicks continue on popup window.
3. FlutterFlow shows auth error.

Expected Behavior

At step 3 user to be authenticated in Firebase.

Steps to Reproduce

1. Create new app in Facebook (it forces API v21)
2. Enable Facebook login as per official instruction.

Reproducible from Blank

• The steps to reproduce above start from a blank project.

Bug Report Code (Required)

ITFXzfLl7ZdPmNhE+qXyK8dVgjgwFjMMbY0v0u0bFB4YF4zzP7MAYeDeR0NKTPWqdAhiMWGkhmcCpvDIkuDLJew4aA2uUbpT0JVAZzrxWlqhWpfTCJaOQ3BCI8JmI26g3J2vgR0nCLJ1LXdn3U2pNq3qNleeY8aSfxBlZ7vfcPo=

Visual documentation

I have investigated the issue in AndroidStudio and I noticed the Facebook AccessTokenType.limited is being used.

If I add in AndroidManifest.xml
<meta-data android:name="com.facebook.sdk.ClientToken" android:value="@string/facebook_client_token" />
and corresponding client-token in strings.xml, then during Facebook authentication AccessTokenType.classic token is being used.

With AccessTokenType.classic user gets authenticated successfully in Firebase and I see user is created with Facebook.
Then in the FlutterFlow app, I got authenticated user with Firebase sign-in.

Environment

[!] Flutter (Channel [user-branch], 3.24.2, on macOS 15.0.1 24A348 darwin-arm64, locale pl-PL)
    ! Flutter version 3.24.2 on channel [user-branch] at /Users/jakub/Library/Application Support/io.flutterflow.prod.mac/flutter
      Currently on an unknown channel. Run `flutter channel` to switch to an official channel.
      If that doesn't fix the issue, reinstall Flutter by following instructions at https://flutter.dev/setup.
    ! The flutter binary is not on your path. Consider adding /Users/jakub/Library/Application Support/io.flutterflow.prod.mac/flutter/bin to your path.
    ! The dart binary is not on your path. Consider adding /Users/jakub/Library/Application Support/io.flutterflow.prod.mac/flutter/bin to your path.
    ! Upstream repository unknown source is not a standard remote.
      Set environment variable "FLUTTER_GIT_URL" to unknown source to dismiss this error.
    • Framework revision 4cf269e36d (8 weeks ago), 2024-09-03 14:30:00 -0700
    • Engine revision a6bd3f1de1
    • Dart version 3.5.2
    • DevTools version 2.37.2
    • If those were intentional, you can disregard the above warnings; however it is recommended to use "git" directly to perform update checks and upgrades.

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
    • Android SDK at /Users/jakub/Library/Android/sdk
    • Platform android-34, build-tools 34.0.0
    • Java binary at: /Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.11+0-17.0.11b1207.24-11852314)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 15.4)
    • Xcode at /Applications/Xcode_15.4.app/Contents/Developer
    • Build 15F31d
    • CocoaPods version 1.15.2

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2024.1)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.11+0-17.0.11b1207.24-11852314)

[✓] VS Code (version 1.94.0)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.98.0

[✓] Connected device (6 available)
    • sdk gphone64 arm64 (mobile)     • emulator-5554                        • android-arm64  • Android 14 (API 34) (emulator)
    • iPhone (Jakub) (mobile)         • 00008110-000644AC3AE3801E            • ios            • iOS 18.0.1 22A3370
    • iPhone 15 Pro Max (mobile)      • 3EE75AEC-2D79-479B-AA39-DA66DA8CF105 • ios            • com.apple.CoreSimulator.SimRuntime.iOS-17-5 (simulator)
    • macOS (desktop)                 • macos                                • darwin-arm64   • macOS 15.0.1 24A348 darwin-arm64
    • Mac Designed for iPad (desktop) • mac-designed-for-ipad                • darwin         • macOS 15.0.1 24A348 darwin-arm64
    • Chrome (web)                    • chrome                               • web-javascript • Google Chrome 130.0.6723.70

[✓] Network resources
    • All expected network resources are available.

! Doctor found issues in 1 category.

Additional Information

Blocking Facebook login implementation (Google and Apple are working as expected).

[Alezanello]

Hello!

Thank you for bringing this to our attention. I’ll double-check the details you mentioned. In the meantime, could you let us know if this issue is still occurring on your end?

Thanks again for your patience!

[jakubmichalski]

Hi @Alezanello
thank you for checking, I can confirm the problem still occurs.
In addition, I was able to check on web (deployed to production, hosted by flutterflow) and the result is nothing happens after press of Facebook button (same code as in case of iOS where I get the Facebook login window). I think the same case was described in #2709.
Also I made sure the email from facebook is not associated with any existing firebase account (i.e. I have removed it).

I have also tried to re-create Meta/Facebook App - there is no improvement.