func login(userName: String!, password:String!, completion: (error: NSError?) -> Void) {
        print(userName)  // Prints PETER for second attempt
        Alamofire.request(
            .GET,
            Management.LOGIN_URL)
            .authenticate(user: userName , password: password)
            .responseJSON { response in
                // But gives JOHN's data for second attempt
                switch response.result {
                case .Success(let JSON):
                    print(JSON)
                    self.setCookies(response)
                    self.setUserData(JSON as! NSDictionary)
                    completion(error: error)
                    }

                case .Failure(let error):
                    completion(error: error)
                }
        }
    }

func logout() {
        Alamofire.Manager.sharedInstance.session.resetWithCompletionHandler { () -> Void in
            print("Resetted")
        }
    }

private func setCookies(response: Alamofire.Response<AnyObject, NSError>) {
        if let
            headerFields = response.response?.allHeaderFields as? [String: String],
            URL = response.request?.URL
        {
            let cookies = NSHTTPCookie.cookiesWithResponseHeaderFields(headerFields, forURL: URL)
            Alamofire.Manager.sharedInstance.session.configuration.HTTPCookieStorage?.setCookies(cookies, forURL: response.response!.URL!, mainDocumentURL: nil)
        }
    }