title: Contents of URL coming back as nil
body: <p>I am doing a fb request and when I try to turn the contents of URL into NSData it comes back as nil? I can't work out where i'm going wrong, my code is:</p>
  
  <pre><code> func fbRequestCompletionHandler(connection:FBRequestConnection!, result:AnyObject!, error:NSError!){
          if let gotError = error{
              //got error
          }
          else{
  
              let email = result["email"]
              let firstName = result["first_name"]
              let userFBID = result["id"]
              println(userFBID) //PRINTS THE CORRECT ID
              let userImageURL = "https://graph.facebook.com/\(userFBID)/picture?type=small"
  
              let url = NSURL(fileURLWithPath: userImageURL)
  
              let imageData = NSData(contentsOfURL: url!)
  
              println(imageData) //PRINTS AS NIL
  }
  }
  </code></pre>