Added endpoint handling there

TOOHUCardAPI/Data/EndpointHandlerAttribute.cs

@@ -0,0 +1,15 @@
+using System;
+
+namespace TOOHUCardAPI.Data
+{
+    [AttributeUsage(AttributeTargets.Method)]
+    public class EndpointHandlerAttribute : System.Attribute
+    {
+        public string Method;
+
+        public EndpointHandlerAttribute(string method)
+        {
+            Method = method;
+        }
+    }
+}