private void Awake()
 {
     if (Instance == null)
     {
         Instance = this;
         loginAPI = new FacebookLoginAPI();
         loginAPI.Initialise(this);
         UserId       = null;
         UserName     = null;
         UserEmail    = null;
         UserLoggedIn = false;
     }
     else
     {
         Destroy(this);
     }
 }