implement character controller methods

server/Models/CharacterFilter.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace server.Models
+{
+    public class CharacterFilter
+    {
+        // TODO: Build character filter model
+    }
+}