using System.ComponentModel.DataAnnotations; namespace khmereid_backend.Dtos; public class SignupRequest { [Required(ErrorMessage = "Phone number is required")] [RegularExpression(@"^\+855\d{8,9}$", ErrorMessage = "Phone number must be in the format +855XXXXXXXX or +855XXXXXXXXX")] public string Phone { get; set; } = string.Empty; }