title: Use Twitter profile picture in iOS app
body: <p>I am using Parse.com as my backend server for an iOS app.  I have fairly easily linked Facebook accounts with each of my PFUser's, but some of them have signed up with their twitter accounts.  How do I obtain their twitter profile picture to show in my app?</p>
  
  <p>I have search a lot for a solution and it is very confusing as some methods seem to have been deprecated in the Twitter API.  I believe it has something to do with an http request, but I am also confused about how to execute that.  Is is synchronous or asynchronous?  Any help would be very much appreciated. </p>