add player to verify condition

MiraAPI.Example/GameOver/NeutralKillerGameOver.cs

@@ -1,4 +1,5 @@
-using MiraAPI.GameEnd;
+using MiraAPI.Example.Roles;
+using MiraAPI.GameEnd;
 using MiraAPI.Utilities;
 using UnityEngine;
 
@@ -6,6 +7,11 @@ namespace MiraAPI.Example.GameOver;
 
 public class NeutralKillerGameOver : CustomGameOver
 {
+    public override bool VerifyCondition(PlayerControl playerControl)
+    {
+        return playerControl.Data.Role is NeutralKillerRole;
+    }
+
     public override void AfterEndGameSetup(EndGameManager endGameManager)
     {
         endGameManager.WinText.text = "Outcast Killer Wins!";