title: Facebook application authorize callback URL
body: <p>I am creating a facebook application which can be added to a facebook fan page as custom tab. In the application setting I can see "Deauthorize Callback" which sends a signed request with page details when a user removes application from a page to the specified URL. Is there an option to specify an authorize callback URL which receives a request with page details when user first installs the application to the page.</p>
  
  <p>Please help.</p>
  
  <p>Thanks in advance.</p>