title: How to filter ios push notifications before they appear
body: <p>Is there anyway to filter push notifications that im send to my app?</p>
  
  <p>I mean, if my user logged out (fb connect) from my app and for somereason my server is miss sync with the loggin-out, i will send to the user notifications while he logged out, which is unwanted situation..</p>
  
  <p>Thanks.</p>