How do I fix this having trouble?

Xcode File Edit View Find Navigate Editor Product Debug Source Control Window Help 88 LagnyoekerFranx) D LognysekerFrank ViewControllerswin) e ViewController 11 class viewController: UIviewController ( 12 13 Override func viewDidLoad) super,viewDdload() guard let sender sender as UIButton else (return) Use of unresolved identifier 'sender 15 16 17 8IBOutlet weak var userName: UITextField QIBOutlet weak var forgotUserNameButton: UIButton! eIBOutlet weak var forgotPasswordButton: UTButton! func forgotuserNamet. sender: Any) ( performSegue(withIdentifier: LandingSegue", sender: forgotUserNameButton) 23 eIBAction fune forgotPassword sender: Any) 25 performSegue(withIdentifier: "LandingSegue", sender: forgotPasswordButton) if sender = forgotPasswordButton { O Expected declaration segue.destination.navigationitem.title"Forgot PassNOrd" segue . destination . navigation!ten.title = "Forgot username. segue.destination.navigationitem.title userName.text 3 else if sender forgotUserNameButton( 12 else t Golf Friend 7 7 Days to Die Call of Duty 4 Auto o