title: How to get FB User ID using Facebook Login Button in android application
body: <p>I'm developing an application in which I'm using <code>Facebook</code> log in button from SDK. I'm able to get <code>access_token</code> of the user but I want <code>userID</code> too. I have tried almost everything but was not successful.  I have used facebook tutorial for achieving that. Here is the link: <a href="https://developers.facebook.com/docs/howtos/androidsdk/3.0/login-with-facebook/" rel="noreferrer">Facebook Login Button</a></p>
  
  <p>Please help me in getting <code>userID</code> from the same login button.</p>
  
  <p>Any kind of help will be appreciated.</p>