Develop Reference

Handling FirebaseAuthUserCollisionException when using FirebaseUI

I am currently using Firebase-UI for Android to implement authentication flow in my app. I currently have Google, Facebook, and Email auth providers enabled. My Android app is built using Jetpack Compose and I'm using rememberLauncherForActivityResult to launch the login intent. Everything is working as expected with the normal flow.
However, when I try to use my Facebook login with the same email that I have previously authenticated using Gmail, I am getting the below error.
A sign-in error occurred.
com.google.firebase.auth.FirebaseAuthUserCollisionException: This credential is already associated with a different user account.**
at com.google.android.gms.internal.firebase-auth-api.zzxc.zzb(com.google.firebase:firebase-auth##21.1.0:4)
at com.google.android.gms.internal.firebase-auth-api.zzya.zza(com.google.firebase:firebase-auth##21.1.0:7)
at com.google.android.gms.internal.firebase-auth-api.zzyb.zzl(com.google.firebase:firebase-auth##21.1.0:1)
at com.google.android.gms.internal.firebase-auth-api.zzxy.zzq(com.google.firebase:firebase-auth##21.1.0:3)
at com.google.android.gms.internal.firebase-auth-api.zzxy.zze(com.google.firebase:firebase-auth##21.1.0:1)
at com.google.android.gms.internal.firebase-auth-api.zzxa.zze(com.google.firebase:firebase-auth##21.1.0:1)
at com.google.android.gms.internal.firebase-auth-api.zzvf.zzd(com.google.firebase:firebase-auth##21.1.0:8)
at com.google.android.gms.internal.firebase-auth-api.zzuf.zzb(com.google.firebase:firebase-auth##21.1.0:2)
at com.google.android.gms.internal.firebase-auth-api.zzyj.zzb(com.google.firebase:firebase-auth##21.1.0:12)
at com.google.android.gms.internal.firebase-auth-api.zzyj.zza(com.google.firebase:firebase-auth##21.1.0:14)
at com.google.android.gms.internal.firebase-auth-api.zzxp.zzq(com.google.firebase:firebase-auth##21.1.0:4)
at com.google.android.gms.internal.firebase-auth-api.zzug.zzb(com.google.firebase:firebase-auth##21.1.0:4)
at com.google.android.gms.internal.firebase-auth-api.zzvf.zzM(com.google.firebase:firebase-auth##21.1.0:5)
at com.google.android.gms.internal.firebase-auth-api.zzvf.zzs(com.google.firebase:firebase-auth##21.1.0:4)
at com.google.android.gms.internal.firebase-auth-api.zzxb.zzm(com.google.firebase:firebase-auth##21.1.0:6)
at com.google.android.gms.internal.firebase-auth-api.zzvr.zzc(com.google.firebase:firebase-auth##21.1.0:1)
at com.google.android.gms.internal.firebase-auth-api.zzyc.run(com.google.firebase:firebase-auth##21.1.0:1)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1137)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637)
at java.lang.Thread.run(Thread.java:1012)
I would like someway to handle this exception but I am not able to find a way. Am I missing something obvious?
Here is my implementation
ProfileViewModel.kt
override fun buildLoginIntent(): Intent {
val authUILayout = AuthMethodPickerLayout.Builder(R.layout.auth_ui)
.setGoogleButtonId(R.id.btn_gmail)
.setEmailButtonId(R.id.btn_email)
.setFacebookButtonId(R.id.btn_facebook)
.build()
val googleScopes = arrayListOf(
"https://www.googleapis.com/auth/userinfo.profile",
"https://www.googleapis.com/auth/userinfo.email"
)
val intent = AuthUI.getInstance().createSignInIntentBuilder()
.setAvailableProviders(
listOf(
AuthUI.IdpConfig.EmailBuilder().build(),
AuthUI.IdpConfig.GoogleBuilder().setScopes(googleScopes).build(),
AuthUI.IdpConfig.FacebookBuilder().build()
)
)
.enableAnonymousUsersAutoUpgrade()
.setLogo(R.mipmap.ic_launcher)
.setAuthMethodPickerLayout(authUILayout)
.build()
return intent
}
#SuppressLint("RestrictedApi")
override fun onLoginResult(result: FirebaseAuthUIAuthenticationResult) {
// Handle result
}
ProfileUI.kt
Composable UI where I launch the intent
val loginLauncher = rememberLauncherForActivityResult(
profileViewModel.buildLoginActivityResult()
) { result ->
if (result != null) {
profileViewModel.onLoginResult(result = result)
}
}
if (isAnonymousUser) {
SignInUI() {
loginLauncher.launch(profileViewModel.buildLoginIntent())
}
}

However, when I try to use my Facebook login with the same email that I have previously authenticated using Gmail, I am getting the below error.
This credential is already associated with a different user account.
That's the expected behavior since your user was first time authenticated with Google. When you authenticate a user in Firebase with Google, there is a user created that contains the data that corresponds to that particular provider. If you try to use that data to authenticate to Facebook, the authentication will fail, because the user was already created with another provider, hence the error.
A solution for this kind of situation would be to check if the user already exists, before authenticating it. If the user already exists, then you have to read the provider and display a message to the user, so it can choose the right authentication provider.
Another option might be to allow the creation of different accounts for different providers. You can find this option which is called "Create multiple accounts for each identity provider" right inside the Firebase Console, in the Settings tab inside the Authentication.

FirebaseMessaging generates same token

I'm trying to generate a new messaging token but it seems to generate the same one, over and over again.
I tried both
FirebaseMessaging.getInstance().deleteToken().addOnCompleteListener {
Log.d("Notifications", "Token Deleted!!!")
}
and
FirebaseInstallations.getInstance().delete().addOnCompleteListener {
Log.d("Notifications", "Token Deleted!!!")
}
Neither seem to trigger the
override fun onNewToken(refreshedToken: String) {}
of the service. And each time i query for the current token i get the same one.
What am i doing wrong?

I am not exactly sure if you can delete the generated token to get a new one. However, as per documentation a token is generated once on app's initial startup.
If you want a new token - simply uninstall the app and install it once again. Then Firebase will generate a new token.

I was having the same issue when trying to log out users.
I would recommend using the depreciated method below:
Thread(Runnable {
Thread.sleep(1000)
FirebaseInstanceId.getInstance().deleteInstanceId()
}).start()
This will not call onNewToken, however, if you now call..
FirebaseMessaging.getInstance().token.addOnCompleteListener { -> task
// get the result here
}
Result should be a new token

Branch IO - Show referral parameters in custom event

In my app I am tracking app install referrals using Branch and I also have a custom event called SIGN_UP which gets sent after the sign up request completes.|
So after using a branch link (fb one in particular) to install and sign up in my app, even though I get normal campaign data in the INSTALL event, I do not seem to get any relevant data in my custom one:
Screenshot of dashboard webhook events when filtered by AAID (see how columns Campaign, Ad Partner 3P, Ad Partner, Channel, Feature are empty in the first row.)
Any reason why this happens?
Code used:
In my Application class:
#Override
public void onCreate() {
super.onCreate();
// ...
Branch.getAutoInstance(this);
// ...
}
In my launcher Activity:
private val callback = Branch.BranchReferralInitListener { referringParams, error ->
if (error == null) {
Timber.i("BRANCH SDK success: %s", referringParams.toString())
} else {
Timber.e("BRANCH SDK error: %s", error.message)
}
}
override fun onStart() {
super.onStart()
Branch.sessionBuilder(this).withCallback(callback).withData(this.intent?.data).init()
}
override fun onNewIntent(intent: Intent?) {
super.onNewIntent(intent)
Branch.sessionBuilder(this).withCallback(callback).reInit()
}
When sending a SIGN_UP event:
Branch.getInstance().setIdentity(memberId)
BranchEvent("SIGN_UP")
.addCustomDataProperty("UDID", udid)
.logEvent(activity)
Branch version: 5.0.1

For Facebook as Ad Network, Branch has the following data limitations
We cannot send device-level Facebook attribution data to third parties.
We cannot send events attributed to Facebook via Data Integrations. Please instead consider analyzing this data in-house (using Webhooks, the Daily Export API, or CSV Exports), or using the Branch Dashboard for all of your analytics and attribution needs.
This data is also not returned in the deeplink session initialization callback within the app. Also, you must have signed Facebook's "Advanced Mobile Measurement" agreement ("Data Use Terms for Advanced Mobile App Measurement") to view this data.

Why Firebase is unable to get PlayGames AuthCode and pass it into its Credential?

To begin with, I'm working on a Unity Game where I'm authenticating user when the game starts. My build environment is android. I'm using Firebase authentication for Google Play Games Services to authenticate user.
When the game starts in my android device or emulator, it is able to authenticate Play Games Services as well as able to connect with Firebase (I'm getting analytics data). However, when I pass the PlayGames AuthCode into Firebase.Auth Credentials, it stops executing the code (I've debug log for it). It does not throw any error in LogCat except
Firebase | server_auth_code
I tried searching web for different issues, but nothing. I checked my keys in player setting, firebase settings, OAuth 2.0 credentials on my Google API console and even check keys from my Google Play Console (which I'm not using at this stage). I have even checked my test users email addresses in Game Services and tried multiple google play games account. But issue still persist.
I'm using similar script in my other unity project where authentication works like a charm. I tried to use same script here and ended up with this issue: here. However, I solved it by removing all the packages and re-importing them into unity and changed my call functions in the script. Now, I'm stuck at this issue.
Here is cs file:
using GooglePlayGames;
using GooglePlayGames.BasicApi;
using UnityEngine.SocialPlatforms;
using System.Threading.Tasks;
public class SetFirebase : MonoBehaviour
{
string authCode;
void Start()
{
PlayGamesClientConfiguration config = new PlayGamesClientConfiguration.Builder().
RequestServerAuthCode(false /* Don't force refresh */).Build();
PlayGamesPlatform.InitializeInstance(config);
PlayGamesPlatform.Activate();
Social.localUser.Authenticate((bool success) =>
{
if (success)
{
authCode = PlayGamesPlatform.Instance.GetServerAuthCode();
Debug.Log("PlayGames successfully authenticated!");
Debug.Log("AuthCode: " + authCode);
}
else
{
Debug.Log("PlayGames SignIn Failed");
}
});
Firebase.FirebaseApp.CheckAndFixDependenciesAsync().ContinueWith(task =>
{
var dependencyStatus = task.Result;
if (dependencyStatus == Firebase.DependencyStatus.Available)
{
Debug.Log("Firebase Ready!!!");
RunFirebase();
}
else
{
Debug.LogError(System.String.Format("Could not resolve all Firebase dependencies: {0}", dependencyStatus));
}
});
}
private void RunFirebase(){
Firebase.Auth.FirebaseAuth auth = Firebase.Auth.FirebaseAuth.DefaultInstance;
Debug.Log("init firebase auth ");
Firebase.Auth.Credential credential = Firebase.Auth.PlayGamesAuthProvider.GetCredential(authCode);
Debug.Log(" passed auth code ");
auth.SignInWithCredentialAsync(credential).ContinueWith(task =>
{
if (task.IsCanceled)
{
Debug.LogError("SignInOnClick was canceled.");
return;
}
if (task.IsFaulted)
{
Debug.LogError("SignInOnClick encountered an error: " + task.Exception);
return;
}
Firebase.Auth.FirebaseUser newUser = task.Result;
Debug.LogFormat("SignInOnClick: User signed in successfully: {0} ({1})", newUser.DisplayName, newUser.UserId);
});
}
}
My LogCat executes everything till "init firebase auth" but does not execute "passed auth code" so I know there is some issue in passing the credentials. It also does not run anything inside auth.SignInWithCredentialAsync(credential).
Any help or suggestion would be highly appreciated. Thank you.

There are two things I may suggest:
1) Replace ContinueWith with ContinueWithOnMainThread. This is a Firebase Extension that will guarantee that your logic runs on the main Unity thread (which tends to resolve many Unity specific issues). I go into more detail about that here.
2) Your logic may have a race condition between the Authenticate callback and the CheckAndFixDependenciesAsync continuation. These will not necessarily run in the order that you see them in your logic.
If I were building this system, I might prefer using Coroutines and a custom yield instruction:
class Authenticate : CustomYieldInstruction
{
private bool _keepWaiting = true;
public override bool keepWaiting => _keepWaiting;
public Authenticate(Social.ILocalUser user) {
user.Authenticate((bool success)=>{
/* old authentication code here */
_keepWaiting = false;
});
}
}
Then in a coroutine have something like:
private IEnumerator InitializeCoroutine() {
/* old authentication code */
// I'm ignoring error checking for now, but it shouldn't be hard to figure in.
// I'm mostly going from memory now anyway
// start both authentication processes in parallel
var authenticate = new Authenticate(Social.localUser);
var firebaseDependenciesTask = FirebaseApp.CheckAndFixDependenciesAsync();
// wait on social
yield return authenticate;
// wait on Firebase. If it finished in the meantime this should just fall through
yield return new WaitUntil(()=>firebaseDependenciesTask.IsComplete);
RunFirebase();
}
This way my logic looks roughly synchronous whilst still maintaining the asynchronosity (spell check claims that I made up that word) of the systems you're depending on and you avoid threading related issues that arise when using ContinueWith.
Let me know if that helps!
--Patrick

Firebase facebook popup returns null onAuth

My firebase facebook popup login on ionic was working correctly but suddenly it stop working (well, i was modifiying the app but i didnt touch the service). The process still works on browser (when i use ionic serve) but not running on ionic app.
var auth = $fAuth(ref);
// login with Facebook
auth.$onAuth(function(authData){ // authData -> null
console.log("Auth..", authData); // Auth.. null
/* refresh user data on firebase and registering push */
});
auth.$authWithOAuthPopup("facebook").catch(function(error) {
console.log("Authentication failed:", error);
});
When it was working, $onAuth cb function was recieving an object in authData variable with properties like uid and facebook.
when i run:
ref.authWithOAuthPopup("facebook",function(){console.log(arguments)})
or:
ref.authWithOAuthPopup("twitter",function(){console.log(arguments)})
the callback function never fires.
I run the auth process on $ionicPlatform.ready event.
I already uninstalled and reinstalled the app, and cleaned app data.
thanks!

Are you sure it doesn't fire?
A callback function that will be called when authentication has completed. On failure, the first argument will be an Error object indicating the failure, with a machine-readable code attribute. On success, the first argument will be null and the second will be an object containing the fields uid (the unique user id), provider (string identifying the provider), auth (the auth. token payload), and expires (expiration time in seconds since the Unix epoch) - and more, depending upon the provider used to authenticate.
You didn't put the arguments there.
I think it should work if you try it again.
Example code from firebase:
ref.authWithOAuthPopup("facebook", function(error, authData) {
// ^^^^^ ^^^^^^^^
if (error) {
console.log("Login Failed!", error);
} else {
console.log("Authenticated successfully with payload:", authData);
}
});