namespace Meezi.Core.Entities; public class SystemAdmin : BaseEntity { public string Name { get; set; } = string.Empty; public string Phone { get; set; } = string.Empty; public bool IsActive { get; set; } = true; /// Optional username for password-based login (alternative to OTP). public string? Username { get; set; } /// PBKDF2/SHA-256 hash. Null means password login is not enabled. public string? PasswordHash { get; set; } }