I'm building an iOS app using a Storyboard. The root view controller is a Home View Controller. I'm creating the login/logout process, and it's mostly working fine, but I've got a few issues. I need to know the BEST way to set all this up. When I tap on login and logout the app works fine but when I tap on Sign up Nothing works I have created a navigation controller too. I'm just not sure what the best method is at this point.

I'm Giving you My Details

This Is MY Switcher Class For Managing View

import UIKit

class Switcher {

static func updateRootViewController() {

    let status = UserDefaults.standard.bool(forKey: Constants.kUserDefaults.isSignIn)
    var rootViewController : UIViewController?

    #if DEBUG
    print(status)
    #endif

    if (status == true) {
        let mainStoryBoard = UIStoryboard(name: "Main", bundle: nil)
        let mainTabBarController = mainStoryBoard.instantiateViewController(withIdentifier: Constants.StoryboardID.homeViewController) as! HomeViewController
        rootViewController = mainTabBarController
    }  else {
    
        let mainStoryBoard = UIStoryboard(name: "Main", bundle: nil)
        let signInViewController = mainStoryBoard.instantiateViewController(withIdentifier: Constants.StoryboardID.signInViewController) as! SignInViewController
        rootViewController = signInViewController
    }

    let appDelegate = UIApplication.shared.delegate as! AppDelegate
    appDelegate.window?.rootViewController = rootViewController

   }

   }

My App Delegate

class AppDelegate: UIResponder, UIApplicationDelegate {

var window: UIWindow?
let storyBoard:UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    IQKeyboardManager.shared.enable = true
    Switcher.updateRootViewController()
    return true
}

Sign UP Button

@IBAction func signUpBtnTapped(_ sender: UIButton) {
    let storyBoard = UIStoryboard(name: "Main", bundle: nil)
    guard let signUpVC = storyBoard.instantiateViewController(withIdentifier: "RegistrationViewController") as? RegistrationViewController else {
        return
    }
    print("Register Tapped")
    self.navigationController?.pushViewController(signUpVC, animated: true)
}