title: GoogleAuth.signOut() does not work
body: <p>I have a google sign-in button on my page, using gapi.signin2.render to render the button (<a href="https://developers.google.com/identity/sign-in/web/reference#gapisignin2renderid-options" rel="nofollow noreferrer">https://developers.google.com/identity/sign-in/web/reference#gapisignin2renderid-options</a>).</p>
  
  <p>However it ALWAYS renders as signed-in, despite calling GoogleAuth.signOut(). In fact I can actually call GoogleAuth.signOut() and immediatly check GoogleAuth.isSignedIn.get() to check the state and returns as true.</p>
  
  <p>Does anyone know how to fix this? My sign-out code is as follows:</p>
  
  <pre><code>var GoogleAuth = gapi.auth2.getAuthInstance();
  
  GoogleAuth.signOut().then(() =&gt; {
  
      var status = GoogleAuth.isSignedIn.get(); //ALWAYS TRUE!!!!
  
      alert('IP.common.oAuth.signOut: signin status: ' + status);
  
  }); 
  </code></pre>