     /// :returns: Request
 
     convenience init(url: NSURL, credential: NSURLCredential?) {
-        self.init(url: url, credentials: credential, additionalHeaders: nil)
+        self.init(url: url, credential: credential, additionalHeaders: nil)
     }
     
     /// Convenience initializer

    /// :returns: Request
    
    convenience init() {
        self.init(url: NSURL(), credentials: nil, additionalHeaders: nil)
    }
  
    // MARK: Public Methods

    /// :param: NSURLCredential? credentials
    /// :param: Array<String,String>? additionalHeaders
    /// :returns: Request
    required init(url: NSURL, credential: NSURLCredential?, additionalHeaders:[String:String]?) {
        println("url for request \(url.absoluteString!)")
        self.sessionURL  = url
        self.httpRequest = NSURLRequest(URL: self.sessionURL)
    
