using System.ComponentModel.DataAnnotations; namespace LittleShop.Models; public class User { [Key] public Guid Id { get; set; } [Required] [StringLength(50)] public string Username { get; set; } = string.Empty; [Required] public string PasswordHash { get; set; } = string.Empty; public DateTime CreatedAt { get; set; } = DateTime.UtcNow; public bool IsActive { get; set; } = true; }