title: Get the email Id from the Twitter Friends in IOS SDK
body: <p>I am able to get the name &amp; profile picture of the my followings &amp; followers (i.e. commonly say friends) of twitter. It works fine.</p>
  
  <p><strong>Question 1</strong>
   Is there any way to get the email_id of the friends?</p>
  
  <p><strong>Question 2</strong></p>
  
  <p>Is there any way to know the friends <code>is_install</code> parameter the app which is use for sending the invitation?</p>
  
  <p>Because in facebook response, we able to get the parameter <code>is_install</code> to know whether friend is already install the app or not.</p>
  
  <p>Thank you,</p>