question

I'm new to Playfab and using Unity. I'm having trouble getting my score to get sent to my Leaderboard. The player connects and logs in fine but I get no information to the score. These are my two scripts.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using PlayFab;
 using PlayFab.ClientModels;
    
 public class PlayfabManager : MonoBehaviour
 {
     // Start is called before the first frame update
     void Start()
     {
         Login();
     }
    
        
     void Login()
     {
         var request = new LoginWithCustomIDRequest
         {
             CustomId = SystemInfo.deviceUniqueIdentifier,
             CreateAccount = true
         };
         PlayFabClientAPI.LoginWithCustomID(request, OnSuccess, OnError);
     }
    
     void OnSuccess(LoginResult result)
     {
         Debug.Log("Successful login/account create!");
     }
    
     void OnError(PlayFabError error)
     {
         Debug.Log("Error while logging in/creating account!");
         Debug.Log(error.GenerateErrorReport());
     }
    
     public void SendLeaderboard(int score)
     {
            
         var request = new UpdatePlayerStatisticsRequest
         {
             Statistics = new List<StatisticUpdate>
             {
                 new StatisticUpdate
                 {
                     StatisticName = "HighScores",
                     Value = score
                 }
             }
         };
         PlayFabClientAPI.UpdatePlayerStatistics(request, OnLeaderboardUpdate, OnError);
     }
    
     void OnLeaderboardUpdate(UpdatePlayerStatisticsResult result) 
     {
         Debug.Log("Succesful leaderboard sent");
            
            
     }
 }

and...

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 using UnityEngine.SceneManagement;
    
    
    
    
 public class CollectableControl : MonoBehaviour
 {
     public static int scoreCount;
     public static int highScoreCount;
     public GameObject scoreCountDisplay;
     public GameObject highScoreDisplay;
     public PlayfabManager playfabManager;
        
    
     void Start()
     {
         highScoreCount = PlayerPrefs.GetInt("highScoreCount", 0);
         SceneManager.activeSceneChanged += OnSceneChanged;
     }
    
     void OnSceneChanged(Scene current, Scene next)
     {
         scoreCount = 0;
     }
        
     void Update()
     {
            
         scoreCountDisplay.GetComponent<TMPro.TextMeshProUGUI>().text = "" + scoreCount;
         highScoreDisplay.GetComponent<TMPro.TextMeshProUGUI>().text = "" + highScoreCount;
    
         if (scoreCount > highScoreCount)
         {
             highScoreCount = scoreCount;
             PlayerPrefs.SetInt("highScoreCount", highScoreCount);
         }
     }
    
     public void HighScores()
     {
         playfabManager.SendLeaderboard(highScoreCount);
            
     }
        
    
    
 }