Segue won't trigger after logged into facebook using swift - ios

Question

So I have managed to set it up so the whole login system works. It closes out of the browser once logged in but does not advance to the next viewController.
This is my AppDelegate.swift:
import UIKit
import CoreData
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
public func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool {
// Override point for customization after application launch.
return FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)
}
public func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
return FBSDKApplicationDelegate.sharedInstance().application(
app,
open: url as URL!,
sourceApplication: options[UIApplicationOpenURLOptionsKey.sourceApplication] as! String,
annotation: options[UIApplicationOpenURLOptionsKey.annotation]
)
}
public func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {
return FBSDKApplicationDelegate.sharedInstance().application(
application,
open: url as URL!,
sourceApplication: sourceApplication,
annotation: annotation)
}
}
This is my ViewController.swift:
import UIKit
import FBSDKCoreKit
import FBSDKLoginKit
class ViewController: UIViewController, FBSDKLoginButtonDelegate {
var fbLoginSuccess = false
override func viewDidLoad() {
if (FBSDKAccessToken.current() != nil && fbLoginSuccess == true)
{
print("Logged In...")
} else {
print("Not Logged In...")
}
let loginButton = FBSDKLoginButton()
loginButton.readPermissions = ["public_profile", "email"]
loginButton.center = self.view.center
loginButton.delegate = self
self.view.addSubview(loginButton)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// Facebook Login.
func loginButton(_ loginButton: FBSDKLoginButton!, didCompleteWith result: FBSDKLoginManagerLoginResult!, error: Error!) {
if error != nil
{
print(error)
} else if result.isCancelled {
// Handle
} else {
fbLoginSuccess = true
print("User logged in...")
self.performSegue(withIdentifier: "showNew", sender: self)
}
}
func loginButtonDidLogOut(_ loginButton: FBSDKLoginButton!) {
print("User logged out...")
}
}
I have a storyboard Identifier 'showNew' and I cannot figure out why it doesn't trigger.