title: GoogleAuthException Unknown Source
body: <p>I am generating token using GoogleUtilAuth.getToken().I have also generated two client ids one for webpage and one for android application and both are in same project .Followed this link </p>
  
  <p><a href="http://android-developers.blogspot.in/2013/01/verifying-back-end-calls-from-android.html">verification from back end server </a></p>
  
  <p>here is my code :</p>
  
  <pre><code>package com.example.tokengenerate;
  
  import java.io.IOException;
  
  import com.google.android.gms.auth.GoogleAuthException;
  import com.google.android.gms.auth.GoogleAuthUtil;
  import com.google.android.gms.auth.UserRecoverableAuthException;
  import com.google.android.gms.common.Scopes;
  
  import android.os.AsyncTask;
  import android.os.Bundle;
  import android.accounts.Account;
  import android.accounts.AccountManager;
  import android.app.Activity;
  import android.util.Log;
  import android.view.Menu;
  import android.widget.TextView;
  
  public class MainActivity extends Activity {
      TextView tv;
      String scope="audience:server:client_id:CLIENTID OF WEBPAGE";
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
          tv =(TextView)findViewById(R.id.printId);
      new AsyncTask&lt;Void, Void, Void&gt;() {
          String id=null;
          @Override
          protected void onPostExecute(Void result) {
              // TODO Auto-generated method stub
              tv.setText(id);
              super.onPostExecute(result);
          }
  
          @Override
          protected Void doInBackground(Void... params) {
              // TODO Auto-generated method stub
  
                  String[] account=getAccountNames();
                  for(int i =0;i&lt;account.length;i++)
                  {
                      try {
                      Log.e("account name", account[i]);
                       id=GoogleAuthUtil.getToken(MainActivity.this, account[i], scope);
                          Log.e("google id",id);
                      } catch (UserRecoverableAuthException e) {
                          // TODO Auto-generated catch block
                          e.printStackTrace();
                      } catch (IOException e) {
                          // TODO Auto-generated catch block
                          e.printStackTrace();
                      } catch (GoogleAuthException e) {
                          // TODO Auto-generated catch block
                          e.printStackTrace();
                      }
                  }
  
  
  
              return null;
          }
      }.execute(null,null,null);
  
  
      }
      private String[] getAccountNames() {
        AccountManager  mAccountManager = AccountManager.get(this);
          Account[] accounts = mAccountManager.getAccountsByType(
                  GoogleAuthUtil.GOOGLE_ACCOUNT_TYPE);
          String[] names = new String[accounts.length];
          for (int i = 0; i &lt; names.length; i++) {
              names[i] = accounts[i].name;
          }
          return names;
      }
  
      @Override
      public boolean onCreateOptionsMenu(Menu menu) {
          // Inflate the menu; this adds items to the action bar if it is present.
          getMenuInflater().inflate(R.menu.main, menu);
          return true;
      }
  
  }
  </code></pre>
  
  <p>Here is my Logcat:</p>
  
  <pre><code>08-27 19:19:54.641: W/System.err(9792): com.google.android.gms.auth.GoogleAuthException: Unknown
  08-27 19:19:54.651: W/System.err(9792):     at com.google.android.gms.auth.GoogleAuthUtil.getToken(Unknown Source)
  08-27 19:19:54.651: W/System.err(9792):     at com.google.android.gms.auth.GoogleAuthUtil.getToken(Unknown Source)
  08-27 19:19:54.651: W/System.err(9792):     at com.example.tokengenerate.MainActivity$1.doInBackground(MainActivity.java:45)
  08-27 19:19:54.661: W/System.err(9792):     at com.example.tokengenerate.MainActivity$1.doInBackground(MainActivity.java:1)
  08-27 19:19:54.661: W/System.err(9792):     at android.os.AsyncTask$2.call(AsyncTask.java:264)
  08-27 19:19:54.661: W/System.err(9792):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
  08-27 19:19:54.661: W/System.err(9792):     at java.util.concurrent.FutureTask.run(FutureTask.java:137)
  08-27 19:19:54.661: W/System.err(9792):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
  08-27 19:19:54.661: W/System.err(9792):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
  08-27 19:19:54.661: W/System.err(9792):     at java.lang.Thread.run(Thread.java:864)
  </code></pre>
  
  <p>Totally stuck please help.Not getting where I am going wrong</p>