title: Google_AuthException : invalid_grant
body: <p>I'm trying to setup the config.php with my values but I get this fatal error:</p>
  
  <p>Fatal error: Uncaught exception 'Google_AuthException' with message 'Error fetching OAuth2 access token, message: 'invalid_grant'.</p>
  
  <p>I entered the client ID, secret, simple API key, location and sqlite database as the documentation says here:
  <a href="https://developers.google.com/glass/quickstart/php">https://developers.google.com/glass/quickstart/php</a></p>
  
  <p>Any idea of what I'm doing wrong?</p>
  
  <p>Thanks in advance!</p>