feat : 토큰 인증 RestApi 구현 / Token기반 haskKey구현 / Dummy, User Token체크 분기

MMOTestServer/MMOserver/Utils/Singleton.cs

@@ -0,0 +1,12 @@
+namespace MMOserver.Utils;
+
+public abstract class Singleton<T> where T : Singleton<T>, new()
+{
+    private static readonly Lazy<T> instance = new Lazy<T>(static () => new T(), LazyThreadSafetyMode.ExecutionAndPublication);
+
+    public static T Instance => instance.Value;
+
+    protected Singleton()
+    {
+    }
+}