PlayFab - Set Name Display

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using PlayFab;
using PlayFab.ClientModels;

public class PlayFabManager : MonoBehaviour
{
    // PlayFab ID Default --> change it
    // Petvenger Dev >> androidvn.com@gmail.com /1q2w3e4r5t@123
    public string PlayfabID = "FD55";
    public string CustomAccountID = "";
    // Time
    public int TimeStartCheckToken = 30;
    public int TimePeriodCheckToken = 30;

    public static PlayFabManager Instance;

    private bool isDoneDownTitleData = false;
    private bool isDoneDownDataUser = false;

    void Awake()
    {
        DontDestroyOnLoad(this);
        Instance = this;
        PlayFabSettings.TitleId = PlayfabID;

        Login("iduser");
    }

    [ContextMenu("Login PlayFab")]
    public void Login(string CustomAccountLogin)
    {
        print("Login with " + CustomAccountLogin);

        LoginWithCustomIDRequest request = new LoginWithCustomIDRequest()
        {
            TitleId = PlayfabID,
            CreateAccount = true,
            CustomId = CustomAccountLogin
        };

        PlayFabClientAPI.LoginWithCustomID(
            request,
            (result) =>
            {
                CustomAccountID = result.PlayFabId;
                Debug.Log("Got PlayFabID: " + CustomAccountLogin);
                if (result.NewlyCreated)
                {
                    Debug.Log("(new account)");
                    setDisplayName("Name Display In PlayFab");
                }
                else
                {
                    Debug.Log("(existing account)");
                }
            },
            (error) =>
            {
                Debug.Log("Error logging in player with custom ID:");
                Debug.Log(error.ErrorMessage);
            }
        );
    }

    private void setDisplayName(String displayName)
    {
        UpdateUserTitleDisplayNameRequest request = new UpdateUserTitleDisplayNameRequest()
        {
            DisplayName = displayName
        };

        PlayFabClientAPI.UpdateUserTitleDisplayName(
            request,
            (result) =>
            {
                print("Current name in playfab: " + result.DisplayName);
            },
            (error) =>
            {
                Debug.Log(error.ErrorMessage);
            }
        );
    }

}