title: Facebook api('/me','GET') returns the user data even after logout
body: <p>In my current project, I am using <code>api('/me','GET')</code> to retrieve the user data of the current logged in user. I have a sync option of my project to the Facebook user, I could also deactivate the sync, the problem is even I logged out my Facebook and change the Facebook user and sync again, it still returns the previous user data.</p>
  
  <p>Here's a snippet of the code:</p>
  
  <pre><code>$user_profile = $facebook-&gt;api('/me','GET');
  
  $fname = $user_profile["first_name"];
  </code></pre>
  
  <p>I am using <code>$fname</code> to display the first name of the Facebook user once synced, the scenario is:</p>
  
  <p>*My project is now synced to my Facebook user, I then logout my Facebook and resync my project. Yet it displays the first name of the previous user I was on.</p>
  
  <p>I can't seem to understand why it retains the user data of the previous user, the only time it syncs with the new Facebook user is when I logout and re-login my website project. I'm using the PHP SDK by the way.</p>