public class Program
{
    public static void Main()
    {
        using (var context = new AppDbContext())
        {
            context.Database.EnsureCreated();

            //Dodawanie nowego uzytkownika
            var user = new User { Username = "Gerard z Rumii", Password = "ciri123"};
            context.Users.Add(user);
            context.SaveChanges();

            //Odczytanie uzytkownikow
            var users = context.Users.ToList();
            foreach (var u in users)
            {
                Console.WriteLine(
                    $"Id: {u.Id}, Username: {u.Username}, Password: {u.Password}");
            }
        }
    }
}