title: Persistent login with Google OAuth2 using the PHP client library
body: <p>I've been using the PHP client library for Google OAuth2. I have everything working perfectly, however, when the token expires around 3600 seconds (60 min.), I get an error.</p>
  
  <p>I had it set to when the access token expires, it redirects to the home page; like so: </p>
  
  <pre><code>     if($client-&gt;isAccessTokenExpired()) {
         session_destroy();
         header('Location: index.php');
       }
  </code></pre>
  
  <p>Works fine, although rather annoying to a user who is logged on and gets logged out 60 min in, trying to use the app.</p>
  
  <p>How can I make the session longer? </p>