title: Request failed: forbidden (403) for fabric twitterkit
body: <p>I'm trying to extract the members of a list using the TwitterKit API for iOS. As I understand, doing this will allow me to be "guest-authenticated" bypassing the need for my personal consumer and consumer-secret keys.</p>
  
  <p>The code below attempts to get the members of a list using <a href="https://dev.twitter.com/rest/reference/get/lists/members" rel="nofollow">this REST endpoint</a></p>
  
  <pre><code>let client = TWTRAPIClient()
  let endpoint = "https://api.twitter.com/1.1/lists/members.json"
  let params = ["owner_screen_name" : "palafo", "slug" : "breakingnews"]
  var clientError : NSError?
  
  let request = client.URLRequestWithMethod("GET", URL: endpoint, parameters: params, error: &amp;clientError)
  
  client.sendTwitterRequest(request) { (response, data, connectionError) -&gt; Void in
     if connectionError != nil {
         print("Error: \(connectionError)")
     }
  
     do {
         let json = try NSJSONSerialization.JSONObjectWithData(data!, options: [])
         print("json: \(json)")
     } catch let jsonError as NSError {
         print("json error: \(jsonError.localizedDescription)")
     }
  }
  </code></pre>
  
  <p>Running that gives me this error:</p>
  
  <pre><code>Error Domain=TwitterAPIErrorDomain Code=220 "Request failed: forbidden (403)" UserInfo={NSLocalizedFailureReason=Twitter API error : Your credentials do not allow access to this resource (code 220), TWTRNetworkingStatusCode=403, NSErrorFailingURLKey=https://api.twitter.com/1.1/lists/members.json?owner_screen_name=palafo&amp;slug=breakingnews, NSLocalizedDescription=Request failed: forbidden (403)})
  </code></pre>
  
  <p>If I change <code>endpoint</code> to instead get the statuses in that list using <a href="https://dev.twitter.com/rest/reference/get/lists/statuses" rel="nofollow">this other REST endpoint</a>, I get a proper JSON response.</p>
  
  <pre><code>let endpoint = "https://api.twitter.com/1.1/lists/statuses.json"
  </code></pre>
  
  <p>Does this mean that Fabric's guest authentication does not allow me to get the members of a list?</p>