title: How to Get authentication, without user intervention
body: <p>I am developing in php and I manage a Google calendars (insert, modify and delete events from a calendar).</p>
  
  <p>Following the examples of Google, always asks me to verify the account validation Google, how I can prevent this?</p>
  
  <p>The example used is: <a href="https://code.google.com/p/google-api-php-client/source/browse/trunk/examples/calendar/simple.php" rel="nofollow">google calendar example</a></p>
  
  <p>Thanks!</p>