title: Facebook Graph API unique id
body: <p>I'm trying to get my Facebook id from an Android app. I logged in and I get the id, but the problem is that, I see that the id obtained from my app is different from that obtained via browser. </p>
  
  <p>How do I get a unique id which, when sent to another phone, can be used to open a Facebook profile?                                                 </p>