Google+ API - Cannot Sign-In - App not registered

Question

I'm trying to log in trough Google+ API but when the login popups open I get

"Android App Not Registered, registering trough Google Console will hide this message"

Now I did register my app and I got an API key and added it to my manifest file

<meta-data
        android:name="com.google.android.geo.API_KEY"
        android:value="xxxxxxxxxxxxxxxxxxxxxxxxxx-xxxxx"/>

Then I configured the API Client like this :

gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
            .requestEmail()
            .requestScopes(new Scope(Scopes.PLUS_LOGIN), new Scope(Scopes.PLUS_ME))
            .build();

    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .enableAutoManage(this, manager)
            .addApi(Auth.GOOGLE_SIGN_IN_API, gso)
            .addApi(Plus.API)
            .build();

EDIT: I also created the google-services.json file and put it inside app/ folder in the project. It logs me in correctly because I can see the username, email and other information but my app isn't shown between the authorized apps in my account.

What am I doing wrong??

Thanks for your help!!

EDIT - SOLVED :

I was using

.requestEmail()

in the GoogleSignInOptions, while I had to replace it with

.requestIdToken([oAuth2 Token])

Now the app gets correctly connected with the Google Console and I'm not getting the "App not registered" error anymore!

Answer 1

For anyone else having this problem, check the GoogleSignInOptions. You should request the token obtained when registering the oAuth2 credentials

gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
        .requestIdToken([oAuth2 Token])
        .requestScopes(new Scope(Scopes.PLUS_LOGIN), new Scope(Scopes.PLUS_ME))
        .build();