title: Creating a new user from Twitter using auth0 get nil email
body: <p>I am using auth0 for my rails application,I tried to sign in with social connection using auth0, this works fine with <strong>google</strong> and <strong>facebook</strong> but when I tried with <strong>twitter</strong> I am getting blank email for user and not able to sign in with the user having blank email.</p>
  
  <p>Here is the response which I am getting </p>
  
  <pre><code>  {  
      "name": "XXXX",  
      "picture": "XXXX",   
      "lang": "en",  
      "screen_name": "XXXX",
      "clientID": "XXXXXX",  
      "user_id": "XXXXX",  
      "nickname": "XXXX",  
      "identities": [  
       {
          "access_token": "XXXX",
          "access_token_secret": "XXXX",
          "provider": "twitter",
          "user_id": XXXX,
          "connection": "twitter",
           "isSocial": true
       }   
     ], 
     "created_at": "2015-04-07T06:00:51.515Z" 
    }
  </code></pre>
  
  <p>How do I get user email for twitter using auth0</p>