Program.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.EntityFrameworkCore;
using LoginApp.Data;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddControllersWithViews();
builder.Services.AddSession(options =>
{
    options.IdleTimeout = TimeSpan.FromMinutes(30);
    options.Cookie.HttpOnly = true;
    options.Cookie.IsEssential = true;
});

builder.Services.AddDbContext<AppDbContext>(options =>
    options.UseSqlite(builder.Configuration.GetConnectionString("DefaultConnection")));

var app = builder.Build();

using (var scope = app.Services.CreateScope())
{
    var dbContext = scope.ServiceProvider.GetRequiredService<AppDbContext>();
    dbContext.Database.EnsureCreated();
}

if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Home/Error");
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();

app.UseRouting();

app.UseSession();

app.UseAuthorization();

app.Use(async (ctx, next) =>
{
    await next();

    if (ctx.Response.StatusCode == 404 && !ctx.Response.HasStarted)
    {
        string originalPath = ctx.Request.Path.Value ?? string.Empty;
        ctx.Items["originalPath"] = originalPath;
        ctx.Request.Path = "/IO/Logowanie";
        await next();
    }
});

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

app.Run();