AppUpInitialize.cs

using UnityEngine;
using System.Collections;

public class AppUpInitialize : MonoBehaviour {
    bool connected = false;
    
	void Awake () {
        DontDestroyOnLoad(gameObject);
        
        if(!connected) {
            AppUp.Connect();
            connected = true;
        }
	}

    void OnApplicationQuit() {
        AppUp.Disconnect();
    }
}