switch to shared random for GenerateCheapGuid

Kyubey/ServiceController.cs

@@ -98,8 +98,12 @@ public class ServiceController : WebApiController
         if (userId is not null && view == -1 || userId is null) // ?????? this game makes no sense dude
         {
             var factor = view == -1 ? 0 : view;
-            Console.WriteLine($"factor={factor}");
-            
+            if (factor > 0 && JewelDbContext.Scores.Count() < 11)
+            {
+                response = "";
+            }
+            else
+            {
                 var globalRanking = JewelDbContext.Scores
                     .Find(e => e.GameMode == mode)
                     .OrderByDescending(e => e.Points)
@@ -113,6 +117,7 @@ public class ServiceController : WebApiController
                 }
             
                 foreach (var score in globalRanking) response += score.ToString();
+            }
         } else // personal ranking
         {
             var personalRanking = JewelDbContext.Scores

Kyubey/Utils.cs

@@ -16,9 +16,8 @@ public class Utils
     // This game is wonderful and working on it is even more so
     public static string GenerateCheapGuid()
     {
-        var rng = new Random();
         var bytes = new byte[8];
-        rng.NextBytes(bytes);
+        Random.Shared.NextBytes(bytes);
         return Convert.ToHexStringLower(bytes);
     }
 }