PlumberUltimateAds/Assets/Scripts/Dev/PlayFab/PlayFabInit.cs

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

public class PlayFabInit : MonoBehaviour
{
    public string playFabTitleId = "7D3B9"; // Replace with your PlayFab Title ID
    void Start()
    {
    
        if (string.IsNullOrEmpty(PlayFabSettings.TitleId))
        {
            PlayFabSettings.TitleId = playFabTitleId;
        }
        Login();
    }

    void Login()
    {
        var request = new LoginWithCustomIDRequest
        {
            CustomId = SystemInfo.deviceUniqueIdentifier,
            CreateAccount = true
        };
        PlayFabClientAPI.LoginWithCustomID(request, OnLoginSuccess, OnLoginFailure);
    }

    private void OnLoginSuccess(LoginResult result)
    {
        Debug.Log("Login successful!");
    }

    private void OnLoginFailure(PlayFabError error)
    {
        Debug.LogError("Login failed: " + error.GenerateErrorReport());
    }
}