Swift 3 - localPlayer auth effects SKSpriteNode's action

Question

Local player auth initial banner effect my sprite node action, stuck 1-2 seconds. And then continue. What should I do for auth local player smoothly?

DispatchQueue.main.async {

        let localPlayer = GKLocalPlayer.localPlayer()

        localPlayer.authenticateHandler = {
            (view, error) in

            if view != nil {

                    self.present(view!, animated: true, completion: nil)

            }
            else {

                print("call save")
                // self.saveHighscore(5)
                print(GKLocalPlayer.localPlayer().isAuthenticated)
            }
        }
    }

Answer 1

My preference is to authenticate as early as possible in the app, as soon as the app starts, well before gameplay starts. Let it happen as soon as the app loads, and be out of the way before you load a scene or start moving nodes.