Program.cs

using Candy_Shop.Attributes;
using Candy_Shop.Data;
using Microsoft.EntityFrameworkCore;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddControllers();
builder.Services.AddControllersWithViews();
builder.Services.AddDbContext<ApplicationDBContext>(
  options => options.UseSqlite("Data Source=db.db")
);
builder.Services.AddSwaggerGen();

builder.Services.AddSession(options => {
  options.IdleTimeout = TimeSpan.FromDays(7);
  options.Cookie.HttpOnly = true;
  options.Cookie.IsEssential = true;
});
builder.Services.AddHttpContextAccessor();

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.UseStaticFiles();

app.UseRouting();

app.UseAuthorization();

app.MapControllers();

app.UseSession();

if (app.Environment.IsDevelopment()) {
  app.UseSwagger();
  app.UseSwaggerUI(options => {
    options.SwaggerEndpoint("/swagger/v1/swagger.json", "v1");
  });
}

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

app.Run();