title: FB.Logout() not working in Facebook UnitySDK
body: <p>I've managed to successfully log in FB using <code>FB.Login</code> function. Now I want to log out:</p>
  
  <pre><code>FB.Logout();
  Debug.Log("FB IS LOGGED IN " + FB.IsLoggedIn);
  </code></pre>
  
  <p>I am expecting the above code to print the value of <code>FB.IsLoggedIn</code> as false and to ask me for a login and password on the next <code>FB.Login</code>.</p>
  
  <p>In fact the value of <code>FB.IsLoggedIn</code> is true and I am not being logged out: next call to  <code>FB.Login</code> does not ask for password and I am not being logged out when I open facebook site in my browser.</p>
  
  <p>I've also tried to use the undocumented request to <code>https://www.facebook.com/logout.php?next=[YourAppURL]&amp;access_token=[ValidAccessToken]</code> but it didn't make any effect for me.</p>
  
  <p>How can I log the user out of facebook in my standalone unity application? </p>
  
  <p><strong><em>In fact what I need is to log in with different login and password.</em></strong> </p>
  
  <p>Maybe I can invalidate the access token somehow which will cause the FB to ask me for login and password again?</p>
  
  <p>Any help is much appreciated.</p>
  
  <p>SDK version: 5.0.1</p>
  
  <p>Build version: 140401.725cc2ecbc9002a</p>
  
  <p>Unity Version 4.3.3f1 (c8ca9b6b9936)</p>