// survey

                let predicate = NSPredicate(format: "surveyId == %i", survey!.id)

                let questions = realm.objects(SurveyQuestion.self).filter(predicate)

                var parameters: Parameters = ["encuesta": (survey?.id)!]

                var arreglo = Array<Dictionary<String, Int>>()

                for element in questions {

                    arreglo.append(["pregunta": element.id, "alternativa": element.selectedChoice])

                }

                parameters["respuestas"] = arreglo


                print(parameters)


++++++++++
++++++++++
++++++++++
++++++++++
++++++++++



        let username: String = userTextField.text!
        let password: String = passwordTextField.text!

        let parameters: Parameters = [
            "rut": username,
            "password": password
        ]


        let url = Requests.MASTER_URL+"/api/url?username="+username

        print(url)
        // REQUEST A MASTER PARA LOG IN
        Alamofire.request(url, method: .get, parameters: parameters)
            .validate()
            .responseJSON { response in


                print(response.result)
            switch response.result {
            case .success(let data):

                print(".success")
                print("Usuario se encuentra en Master")

                let json = JSON(data)
                //if json["code"] == 0 {

                let tempCredential = LogInCredential()
                tempCredential.username = username
                tempCredential.password = password

                try! realm.write {

                    realm.add(tempCredential, update: true)

                }

                Requests.BASE_URL = json["url"].string!

                let iconImage = IconImage()

                iconImage.iconUrl = Requests.MASTER_URL+json["logo"].string!

                try! realm.write {

                    realm.add(iconImage, update: true)

                }


                let parameters: Parameters = [
                    "username": username,
                    "password": password
                ]

                self.request = APIManager.sharedInstance.logIn(parameters: parameters){ error, json in


                    if let e = error{
                        print(e)

                        self.passwordTextField.text = ""

                        Utils.message(self, title: "Error", msg: "Error al iniciar sesión.")
                        loadingNotification.hide(animated: true)

                    } else {

                        Requests.AUTH_TOKEN = (json?["token"].string!)!
                        print(Requests.AUTH_TOKEN)

                        loadingNotification.hide(animated: true)
                        self.performSegue(withIdentifier: "LoadingSegue", sender: self)

                    }
                }

            case .failure(let error):
                print(error)

                loadingNotification.hide(animated: true)

                Utils.message(self, title: "Error", msg: "Error al iniciar sesión.")

            }