Refactoring - split data, logic and model layers; custom network exception

StudentHouseDashboard/Models/UserRole.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+
+namespace Models
+{
+    public enum UserRole
+    {
+        [Display(Name = "Tenant")]
+        TENANT,
+        [Display(Name = "Manager")]
+        MANAGER,
+        [Display(Name = "Administrator")]
+        ADMIN
+    }
+}