Adding admin controller and service

Services/AdminService.cs

@@ -0,0 +1,17 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace GameAuthApi.Services;
+
+public class AdminService
+{
+    public virtual Task<Dictionary<string, string>> GetStatusAsync()
+    {
+        var status = new Dictionary<string, string>
+        {
+            {"status", "ok"}
+        };
+        return Task.FromResult(status);
+    }
+}
+