Google login using cordova googleplus plugin

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Android

plugin

Google+

Cordova

I want google login in cordova app for android platform by using **cordova  googleplus plugin** so I have made an android app on console developers google on google account and integrate it with my cordova app but when i run my cordova app on emulator i am facing error with code:8 and when i run on android phone the error becomes error:12501.So how to resolve it to run google login on my cordova app?

What I have tried:

I am trying to use cordova googleplus plugin for android platform in my cordova app
Here is my index.js code:

bindEvents: function () {
        document.getElementById('loginBtn').addEventListener('click', function () {
            window.plugins.googleplus.login(
        {
            'scopes': '', // optional, space-separated list of scopes, If not included or empty, defaults to `profile` and `email`.
            'webClientId': '', // optional clientId of your Web application from Credentials settings of your project - On Android, this MUST be included to get an idToken. On iOS, it is not required.
            'offline': true, // optional, but requires the webClientId - if set to true the plugin will also return a serverAuthCode, which can be used to grant offline access to a non-Google server
        },
        function (obj) {
            alert(JSON.stringify(obj)); // do something useful instead of alerting
        },
        function (msg) {
            alert("error");
            alert(msg);
        }
    );
        })
        document.addEventListener('deviceready', deviceReady, false);