Update FUICustomAuthUIDelegate.swift

Author: ulukaya

samples/swift/FirebaseUI-demo-swift/Samples/Auth/FUICustomAuthUIDelegate.swift

@@ -21,18 +21,15 @@ import FirebaseAuth
 class FUICustomAuthDelegate: NSObject, FUIAuthDelegate {
 
  func authUI(_ authUI: FUIAuth, didSignInWith user: User?, error: Error?) {
- guard let authError = error else { return }
-
- let errorCode = UInt((authError as NSError).code)
-
- switch errorCode {
- case FUIAuthErrorCode.userCancelledSignIn.rawValue:
- print("User cancelled sign-in");
- break
- default:
- let detailedError = (authError as NSError).userInfo[NSUnderlyingErrorKey] ?? authError
- print("Login error: \((detailedError as! NSError).localizedDescription)");
- }
+ switch error {
+ case .some(let error as NSError) where UInt(error.code) == FUIAuthErrorCode.userCancelledSignIn.rawValue:
+ print("User cancelled sign-in")
+ case .some(let error as NSError) where error.userInfo[NSUnderlyingErrorKey] != nil:
+ print("Login error: \(error.userInfo[NSUnderlyingErrorKey]!)")
+ case .some(let error):
+ print("Login error: \(error.localizedDescription)")
+ case .none:
+ return
  }
 
  func authPickerViewController(forAuthUI authUI: FUIAuth) -> FUIAuthPickerViewController {