Detect Firebase Auth Provider for Loged in User

user_7132928 0
Viewed 3806

How can i check that my user Loged in to my app Using which Auth Provider ? I wanted to detect that did my user loged in to my app using Facebook auth provider or using Email Provider or by using Google auth provider . I have searched this in Firebase Docs but i couldnt find any proper answer ,

firebase-authentication firebase facebook authentication android
6 Answers
FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
if (firebaseUser.getProviderData().size() > 0) {
            //Prints Out google.com for Google Sign In, prints facebook.com for Facebook
            e("TOM", "Provider: " + firebaseUser.getProviderData().get(firebaseUser.getProviderData().size() - 1).getProviderId());

        }
user_72563760

You can use method getIdTokenResult() of your user object (firebase.User) to get IdTokenResult object, whose signInProvider property you can use to detect signin method of your logged in user.

user_15914120

Reached here for same issue, unable to find the provider that user used to login.
I am working on react-js app using react-firebaseui lib for readymade UI.
After a lil struggle, I simply analysed the "user" object returned by auth and in that we receive an array "providerData".

Without further analysis I decided to use:

  const signinProvider = user.providerData[0].providerId;

In my case, we use only 2 providers google & password.
I get the user from "onAuthStateChanged" function as below:

import { fbAuth } from "./firebase";

fbAuth.onAuthStateChanged(function (user) {
    if (user) {
      console.log("authStateChanged:=====", user);
      useItFurther(user);
    } else {
      console.log("authStateChanged: no user logged in.");
      cleanUpAuthDetailsIfApplicable();
    }
  });

CAUTION: I haven't researched why is providerData an array and what more can be there in that array, what could be the sequence when there are more than 1 objects in that array, etc.
In my case, we had to add a condition for email validation based on provider. Like, for a particular domain email address, force user to use a specific provider.

user_16665820

I have been puzzled over this problem and couldnt find an appropriate solution for a long time as well. The solution turns out to be short:

String strProvider = FirebaseAuth.getInstance().
         getAccessToken(false).getResult().getSignInProvider();

So, if (strProvider.equals("password")) then the authentication is by Email + Password,
if (strProvider.equals("google.com")) then the authentication is via Google,
if (strProvider.equals("facebook.com")) then the authentication is via Facebook.

Addition

However, with this one-liner you can get an exception wchich can be prevented by adding OnSuccessListener like so:

mAuth = FirebaseAuth.getInstance();
mAuth.getAccessToken(false).addOnSuccessListener(new OnSuccessListener<GetTokenResult>() {
                @Override
                public void onSuccess(GetTokenResult getTokenResult) {
                    strProvider = getTokenResult.getSignInProvider();
                }
            });
user_147420950

Alternative

The getProviders() method list is sorted by the most recent provider used to sign in. So the first element in getProviderData() is the method that the user used to sign in.

Also the reason why FirebaseAuth.getInstance().getCurrentUser().getProviderId() returns firebase is because a backing Firebase Account is always created irrespective of how the user signs in. This helps with linking and unlinking of accounts where users may want to attach more than one credential (however your view of the FirebaseUser has not changed).

as mention this post.

user_26064110
Related