leaderboard feature added

Assets/DarkMatter/Code/Presentation/LeaderBoard/LeaderBoardInitializer.cs

@@ -0,0 +1,28 @@
+using Unity.Services.Core;
+using System.Threading.Tasks;
+using Unity.Services.Authentication;
+using UnityEngine;
+
+
+namespace Darkmatter.Presentation
+{
+    public class LeaderBoardInitializer : MonoBehaviour
+    {
+        private async void Awake()
+        {
+            await Init();
+        }
+
+        private async Task Init()
+        {
+            await UnityServices.InitializeAsync();
+            if (!AuthenticationService.Instance.IsSignedIn)
+            {
+                await AuthenticationService.Instance.SignInAnonymouslyAsync();
+            }
+            PlayerPrefs.SetString("PlayerID", AuthenticationService.Instance.PlayerId);
+            PlayerPrefs.Save();
+        }
+    }
+}
+