title: Facebook sdk 3.0 at android another user cannot login
body: <p>I'm making android application which is related with Facebook.</p>
  
  <p>My application had succeed at logging on Facebook version 3.0 sdk.</p>
  
  <p>However, the problem is that user who can log on this application is only me.
  This means that nobody can log on my application. </p>
  
  <p>How can I handle this problem?</p>