need help with code please

hi i make a 2d game and i want to submit the player highscore to googleplay leaderboard using cloudonce plugin
so everything is good in the game i have highscore but the problem i have a script for highscore that get the bestscore from another script using playerpref and i make this playerprfe = currentscore but when i test the game in my phone it open googleplay but not sumbit anything in the leaderboard so can you please help me

this is my script

score script

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class Score : MonoBehaviour
{
    public AudioSource playerHit;
    private int score = 1;
    private GameplayManager gameplayManager;


    void Start()
    {
        playerHit = GetComponent<AudioSource>();   
    }

    private void Awake()
    {
        gameplayManager = GameObject.FindObjectOfType<GameplayManager>();
    }



     void OnTriggerEnter2D(Collider2D collision)
    {
        playerHit.Play();
        gameplayManager.UpdateScore(score);
        

    }
}

GameplayManager script

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class GameplayManager : MonoBehaviour
{

    public Text scoreText;
    public Text highScore;
    private int currentScore;

    private void Start()
    {
        PlayerPrefs.SetInt("Points", 0);
        PlayerPrefs.GetInt("HighScore", 0);
    }

    public void UpdateScore(int score)
    {
        currentScore += score;
        scoreText.text = "" + currentScore.ToString();
        PlayerPrefs.SetInt("Points", currentScore);

        if(currentScore > PlayerPrefs.GetInt("HighScore", 0))
        {
            PlayerPrefs.SetInt("HighScore", currentScore);
        }
        
    }


    

}

highscore script

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class highscore : MonoBehaviour
{
    private int currentScore;
    public Text bestScore;
    // Start is called before the first frame update


    void Awake()
    {
        currentScore = PlayerPrefs.GetInt("HighScore");
        bestScore.text = "" + currentScore.ToString();

        CloudOnceServices.instance.SubmitScoreToLeaderboard(currentScore);

    }
}

CloudOnceServices script

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using CloudOnce;
public class CloudOnceServices : MonoBehaviour
{
    public static CloudOnceServices instance;

    private void Awake()
    {
        TestSingleton();
    }

    private void TestSingleton()
    {
        if (instance!= null) { Destroy(gameObject); return; }
        instance = this;
        DontDestroyOnLoad(gameObject);
       
    }
    
    public void SubmitScoreToLeaderboard(int currentScore)
    {
        Leaderboards.HighScore.SubmitScore(currentScore);
    }
}

can you please help me