PerformSegue after successful Facebook login

Question

I'm trying to adopt Facebook login process for my application goals. After successful Facebook login, I want to send a User to another View. For this reason, I'm using PerformSegue in UserLoginManager class, but always get the same issue in the AppDelegate file: Thread 1: "Receiver (<Leeeeeds.UserLoginManager: 0x7f9015010010>) has no segue with identifier 'gonext'"* (spelling for the identifier is correct, I've checked it thousands of times).*

At the same time, in debug console I see: Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Receiver (<Leeeeeds.UserLoginManager: 0x7f9015010010>) has no segue with identifier 'gonext''terminating with uncaught exception of type NSException CoreSimulator 802.6.1 - Device: iPhone 11

Here is my AppDelegate code:

import UIKit
import FacebookCore
import FacebookLogin


@main

class AppDelegate: UIResponder, UIApplicationDelegate {

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        ApplicationDelegate.shared.application(
            application,
            didFinishLaunchingWithOptions: launchOptions
        )
        return true
    }
    
    func application(
        _ app: UIApplication,
        open url: URL,
        options: [UIApplication.OpenURLOptionsKey : Any] = [:]
    ) -> Bool {
        ApplicationDelegate.shared.application(
            app,
            open: url,
            sourceApplication: options[UIApplication.OpenURLOptionsKey.sourceApplication] as? String,
            annotation: options[UIApplication.OpenURLOptionsKey.annotation]
        )
    }
}

And my UserLoginManager class:

import Foundation
import FacebookLogin

let loginManager = LoginManager()

class UserLoginManager: UIViewController {
    func facebookLogin() {
        loginManager.logIn(permissions: [.publicProfile, .email], viewController: nil) { loginResult in
            switch loginResult {
            case .failed(let error):
                print(error)
            case .cancelled:
                print("User cancelled login.")
            case .success(let grantedPermissions, let declinedPermissions, let accessToken):
                self.performSegue(withIdentifier: "gonext", sender: self)
                print("Logged in! \(grantedPermissions) \(declinedPermissions) \(accessToken)")
                GraphRequest(graphPath: "me", parameters: ["fields": "id, name, first_name"]).start(completionHandler: { (connection, result, error) -> Void in
                    if (error == nil){
                        let fbDetails = result as! NSDictionary
                        print(fbDetails)
                    }
                })
            }
        }
    }
}

Here is my ViewController:

import UIKit
import FacebookLogin

class ViewController: UIViewController {
    
    var fbmanager = UserLoginManager()
    
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
    @IBAction func facebook(_ sender: UIButton) {
        fbmanager.facebookLogin()
    }

}

Thanks for any advice!