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

StudentHouseDashboard/WebApp/Pages/Logout.cshtml.cs

@@ -0,0 +1,15 @@
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+
+namespace WebApp.Pages
+{
+    public class LogoutModel : PageModel
+    {
+        public IActionResult OnGet()
+        {
+            HttpContext.SignOutAsync();
+            return RedirectToPage("Index");
+        }
+    }
+}