Android: Firebase Auth For Cloud End Point Not Working

I have followed the link and have done the configuration on the server as mentioned. '/users': post: description: '' operationId: '' pro

Solution 1:

After so many days of struggle I am able to solve the issue.

I solved the issue by following this,

"/users":post:description:"<Description>"operationId:"<OperationID>"produces:-"application/json"responses:200:description:"user List"schema:$ref:"#/definitions/echoMessage"parameters:-description:"Search Criteria"in:bodyname:messagerequired:trueschema:$ref:"#/definitions/echoMessage"security:-firebase: []

and

firebase:
authorizationUrl: ""
flow: "implicit"type: "oauth2"x-google-issuer: "https://securetoken.google.com/<Project-ID>"x-google-jwks_uri: "https://www.googleapis.com/service_accounts/v1/metadata/x509/securetoken@system.gserviceaccount.com"x-google-audiences: "<Project-ID>"//I have added this, this was the main culprit.

as mentioned in the comment, I was missing

x-google-audiences: ""

in the server configuration.

And for another clarification for which token to use: We have to use the second approach that I have mentioned in the question, i.e, as below,

FirebaseUserfirebaseUser= FirebaseAuth.getInstance().getCurrentUser();
    if (firebaseUser != null) { 

        firebaseUser.getIdToken(true)
                .addOnSuccessListener(newOnSuccessListener<GetTokenResult>() { 
                    @OverridepublicvoidonSuccess(GetTokenResult getTokenResult) {
                        Stringtoken= getTokenResult.getToken();
                        SharedPreferences.Editoreditor= mSharedPreferences.edit();
                        editor.putString(Constants.PREFS_FCM_TOKEN, token);
                        editor.apply();
                    } 
                }); 
    }