title: facebook omniauth with devise not working
body: <p>I used omniauth customized with devise for facebook signup  for my rails app.<br>
  when  go for "Sign in with facebook", it works for me as I am the one who created the<br>acebook app at acebook developers console.<br>
  but When someone else tries to use his acebook account, I get a message in Facebook page<br> saying <b>"the developer hasn't created the app properly"</b><br>
  Can anyone help me in fixing my Facebook app??</p>