User Authentication with Password Change

import UIKit
 
class ViewController: UIViewController {
 
    // Determine output variables
    @IBOutlet weak var loginTextField: UITextField!
    @IBOutlet weak var passwordTextField: UITextField!
    @IBOutlet weak var newPasswordTextField: UITextField!
    @IBOutlet weak var confirmPasswordTextField: UITextField!
    @IBOutlet weak var authButton: UIButton!
    @IBOutlet weak var resultTextView: UITextView!
 
    // Redetermine method
    override func viewDidLoad() {
        super.viewDidLoad()
        self.authButton.isEnabled = true
        self.initializeFramework()
    }
 
    // Set method that will be executed on button click
    @IBAction func authWithChangePassword(_ sender: UIButton) {
        self.authButton.isEnabled = false
        self.resultTextView.text = "Changing password"
        self.authWithChangePassword() { (jsonResult) in
            self.authButton.isEnabled = true
            self.resultTextView.text = String(format: "%@", jsonResult)
        }
    }
 
    // Initialize framework
    private func initializeFramework() {
        let apiVersion: String = "v1"
        let host: String = "http://testmasterfmp.fsight.cloud/"
        let environment: String = "DocumentationExampleEnv"
        let project: String = "DocumentationExampleProj"
        let device: String = (UIDevice.current.identifierForVendor?.uuidString)!
        HHFWController.sharedInstance().initWithCredentials(
            apiVersion,
            host: host,
            environment: environment,
            project: project,
            device: device
        )
    }
 
    // Authenticate
    private func authWithChangePassword(completion: @escaping (NSDictionary)->()) {
        let username: String = self.loginTextField.text ?? ""
        let password: String = self.passwordTextField.text ?? ""
        let newPassword: String = self.newPasswordTextField.text ?? ""
        let confirmPassword: String = self.confirmPasswordTextField.text ?? ""
        HHFWController.sharedInstance().auth(username, password: password, newPassword: newPassword, confirmPassword: confirmPassword) { (jsonResult) in
            if let jsonDict = jsonResult as? NSDictionary,
                let status = jsonDict["status"] as? String, status == "ok" {
                print("Auth success")
                completion(jsonDict)
            } else {
                print("Auth error")
            }
        }
    }
}