Program.cs

using Microsoft.EntityFrameworkCore;
using Microsoft.AspNetCore.Authentication.Cookies;

var builder = WebApplication.CreateBuilder(args);
builder.Services.AddDbContext<ShoppingApp.Models.ShoppingDbContext>(options =>
    options.UseSqlServer(builder.Configuration.GetConnectionString("DefaultConnection")));

// Add services to the container.
builder.Services.AddControllersWithViews();

builder.Services.AddScoped<ShoppingApp.Services.IProductService, ShoppingApp.Services.ProductService>();
builder.Services.AddScoped<ShoppingApp.Services.ICartService, ShoppingApp.Services.CartService>();
builder.Services.AddScoped<ShoppingApp.Services.IUserService, ShoppingApp.Services.UserService>();

builder.Services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
    .AddCookie(options =>
    {
        options.LoginPath = "/Users/Login";
        options.LogoutPath = "/Users/Logout";
        options.AccessDeniedPath = "/Users/Login";
    });

var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Home/Error");
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseRouting();

app.UseAuthentication();
app.UseAuthorization();

app.MapStaticAssets();

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}")
    .WithStaticAssets();


app.Run();