title: GoogleSignInResult#isSuccess() returns false everytime
body: <p>I am trying to enable <a href="https://developers.google.com/identity/sign-in/android/start-integrating" rel="nofollow noreferrer">google signin in my android app</a> following <a href="https://www.simplifiedcoding.net/google-login-android-tutorial-integrate-gplus-login/" rel="nofollow noreferrer">this</a> tutorial.. But <code>GoogleSignInResult#isSuccess()</code> always return <code>false</code>. The value of <code>result.getStatus().getStatusCode();</code> is <code>0</code> which was success accoding to <a href="https://developers.google.com/android/reference/com/google/android/gms/common/api/CommonStatusCodes" rel="nofollow noreferrer">GoogleAPI's CommonStatusCode</a></p>
  
  <p>I researched a bit and found <a href="https://stackoverflow.com/questions/33583326/new-google-sign-in-android">similar</a> issues. I have tried</p>
  
  <ol>
  <li><p>Generating a <code>google-services.json</code> from SHA key from my application and pasting it in my app folder.</p></li>
  <li><p>Also by generating signed apk and seprately(not running from android studio) installing it in my phone</p></li>
  </ol>
  
  <p>But none of them works for me.</p>
  
  <p>Any help would be appreciated</p>