Startup.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Authentication.Cookies;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace ShopWebApp
{
    public class Startup
    {

        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc();
            services.AddRazorPages();
            services.AddControllersWithViews();
            services.AddAuthentication(options =>
            {
                options.DefaultChallengeScheme = CookieAuthenticationDefaults.AuthenticationScheme;
                options.DefaultSignInScheme = CookieAuthenticationDefaults.AuthenticationScheme;
                options.DefaultAuthenticateScheme = CookieAuthenticationDefaults.AuthenticationScheme;
            }).AddCookie(options =>
            {
                options.LoginPath = new PathString("/Account/Login");
                options.Cookie.Name = "NasusCookie";
                options.ExpireTimeSpan = TimeSpan.FromMinutes(60);
                options.SlidingExpiration = true;
                options.AccessDeniedPath = new PathString("/Account/Denied");
            });
            services.AddAuthorization();
            services.AddDistributedMemoryCache();
            services.AddSession(options =>
            {
                options.IdleTimeout = TimeSpan.FromMinutes(30);
                options.Cookie.IsEssential = true;
                options.Cookie.Name = ".Nasus.Session";
            });
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseStaticFiles();
            app.UseRouting();
            
            app.UseAuthentication();
            app.UseAuthorization();
            app.UseSession();
            var db = new ShopDatabase();
            db.Database.EnsureCreated();

            app.UseStatusCodePagesWithRedirects("/Error/{0}");
            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
                endpoints.MapControllerRoute(
                "default", "{controller=Home}/{action=Index}/{id?}");
            });         
        }
    }
}