title: Detect current user facebook user
body: <p>I have an android app that uses facebook SDK.</p>
  
  <p>I have a problem with this scenario:</p>
  
  <p>I use the my app for the first time then I log in my facebook account in my app. The credentials are then save in the app so that users will not be ask to log in again. Now, in the facebook app, I log out my account then log in again with a different user. When I go back to my app and retrieve the some user info, it still has the old user in it. </p>
  
  <p>I tried to check it using <code>Profile.getcurrentProfile()</code> but it still contains info on the old user.</p>
  
  <p>Is there any way to detect who's currently using the facebook app? </p>