title: Cannot resolve symbol 'Auth' for google integration in android studio
body: <p>i am new in androidstudio. i have done integration of google in eclipse but am having issues in studio.
  i am following step by step from this site : <a href="https://developers.google.com/identity/sign-in/android/sign-in?configured=true">https://developers.google.com/identity/sign-in/android/sign-in?configured=true</a></p>
  
  <p>but i am having an issue. i am getting an error that Cannot resolve symbol 'Auth' which i need for API and also cannot resolve 'SignInButton', see the code:</p>
  
  <pre><code>import android.os.Bundle;
  import android.support.v7.app.AppCompatActivity;
  import com.google.android.gms.auth.api.Auth;
  import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
  import com.google.android.gms.common.ConnectionResult;
  import com.google.android.gms.common.SignInButton;
  import com.google.android.gms.common.api.GoogleApiClient;
  
  
  public class MainActivity extends AppCompatActivity implements GoogleApiClient.OnConnectionFailedListener {
  GoogleSignInOptions gso;
      GoogleApiClient mGoogleApiClient;
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
          gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN).requestEmail().build();
         mGoogleApiClient = new GoogleApiClient.Builder(this)
      .enableAutoManage(this /* FragmentActivity */, this /* OnConnectionFailedListener */)
      .addApi(Auth.GOOGLE_SIGN_IN_API, gso)
      .build();
      }
  
      @Override
      public void onConnectionFailed(ConnectionResult connectionResult) {
  
      }
  }
  </code></pre>
  
  <p>this is my project gradle:</p>
  
  <pre><code>// Top-level build file where you can add configuration options common to all sub-projects/modules.
  
  buildscript {
      repositories {
          jcenter()
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:1.3.0'
          classpath 'com.google.gms:google-services:1.5.0-beta2'
  
          // NOTE: Do not place your application dependencies here; they belong
          // in the individual module build.gradle files
      }
  }
  
  allprojects {
      repositories {
          jcenter()
      }
  }
  
  task clean(type: Delete) {
      delete rootProject.buildDir
  }
  </code></pre>
  
  <p>this is my app gradle:</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 23
      buildToolsVersion "23.0.2"
  
      defaultConfig {
          applicationId "com.creaa.admin.googlesignin"
          minSdkVersion 11
          targetSdkVersion 23
          versionCode 1
          versionName "1.0"
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
      compileOptions {
          sourceCompatibility JavaVersion.VERSION_1_7
          targetCompatibility JavaVersion.VERSION_1_7
      }
  }
  
  dependencies {
      compile fileTree(include: ['*.jar'], dir: 'libs')
      testCompile 'junit:junit:4.12'
      compile 'com.android.support:appcompat-v7:23.1.0'
      apply plugin: 'com.google.gms.google-services'
  
  }
  </code></pre>
  
  <p>Please help me.</p>