public void Login(Action doneCallback)
    {
        new LoginTask((result) =>
        {
            playFabId = result.PlayFabId;
            newlyPlayer = result.NewlyPlayer;
            profile = ParseProfile(result.ProfileData);
            doneCallback();
        }, HandleError).Run();
    }

    private class LoginTask
    {
        public Action<LoginTask> successCallback;
        public Action<string, string> errorCallback;

        public string PlayFabId { get; private set; }
        public bool NewlyPlayer { get; private set; }
        public Dictionary<string, UserDataRecord> ProfileData { get; private set; }

        public LoginTask(Action<LoginTask> successCallback, Action<string, string> errorCallback)
        {
            this.successCallback = successCallback;
            this.errorCallback = errorCallback;
        }

        public void Run()
        {
            GoogleAuthenticate();
        }
        private void GoogleAuthenticate()
        {
            Social.localUser.Authenticate((success, error) =>
            {
                if (success)
                {
                    var serverAuthCode = PlayGamesPlatform.Instance.GetServerAuthCode();
                    PlayfabLogin(serverAuthCode);
                }
                else
                    errorCallback("google_auth", error);
            });
        }
        private void PlayfabLogin(string serverAuthCode)
        {
            PlayFabClientAPI.LoginWithGoogleAccount(new LoginWithGoogleAccountRequest()
            {
                ServerAuthCode = serverAuthCode,
                CreateAccount = true
            }, (result) =>
            {
                PlayFabId = result.PlayFabId;
                NewlyPlayer = result.NewlyCreated;
                if (result.NewlyCreated)
                    CreateProfile();
                else
                    GetProfile();
            }, (playFabError) => errorCallback("playfab_login", playFabError.GenerateErrorReport()));
        }
        private void CreateProfile()
        {
            PlayFabClientAPI.ExecuteCloudScript(new ExecuteCloudScriptRequest()
            {
                FunctionName = "createProfile"
            }, (result) =>
            {
                GetProfile();
            }, (error) => errorCallback("create_profile", error.GenerateErrorReport()));
        }
        private void GetProfile()
        {
            PlayFabClientAPI.GetUserReadOnlyData(new GetUserDataRequest(), (result) =>
            {
                ProfileData = result.Data;
                successCallback(this);
            }, (error) => errorCallback("get_profile", error.GenerateErrorReport()));
        }
    }