title: Invite new users for my app using app notifications facebook
body: <p>My app logs in via facebook and all friends of facebook user logged is listed to be invited to download my app. I want guests to be advised via facebook through a notification.
  I've done the test via "Graph Api Explore" as follows:</p>
  
  <blockquote>
    <p>POST/{recipient_userid}/notifications? access_token = ... &amp; template = John is inviting you to learn a new app. &amp; href = ... "</p>
  </blockquote>
  
  <p>but I noticed that the notification comes only to those who already have my application installed. </p>
  
  <blockquote>
    <p>{return: "(#200) Cannot send notifications to a user who has not installed the app"}</p>
  </blockquote>
  
  <p>how do I send notifications for facebook users that still do not have my application installed?
  thks!</p>