adding hidden basic asp.net core backend (#30)

Base functionality:

    DB
    email sending
    user registration & login
    storing new characters and reading them back

Notes:

    Functionality is "hidden" with no links pointing to it.
    Most pages are scaffolded and not reviewed at all :(
    local Dev db setup is pushed to git
    NO local email setup :(

Kemkas.Web/Areas/Identity/Pages/Account/Manage/PersonalData.cshtml.cs

@@ -0,0 +1,37 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+using System;
+using System.Threading.Tasks;
+using Kemkas.Web.Db.Models;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+using Microsoft.Extensions.Logging;
+
+namespace Kemkas.Web.Areas.Identity.Pages.Account.Manage
+{
+    public class PersonalDataModel : PageModel
+    {
+        private readonly UserManager<ApplicationUser> _userManager;
+        private readonly ILogger<PersonalDataModel> _logger;
+
+        public PersonalDataModel(
+            UserManager<ApplicationUser> userManager,
+            ILogger<PersonalDataModel> logger)
+        {
+            _userManager = userManager;
+            _logger = logger;
+        }
+
+        public async Task<IActionResult> OnGet()
+        {
+            var user = await _userManager.GetUserAsync(User);
+            if (user == null)
+            {
+                return NotFound($"Unable to load user with ID '{_userManager.GetUserId(User)}'.");
+            }
+
+            return Page();
+        }
+    }
+}