namespace UniVerse.Domain.Entities; public class RefreshToken { public int Id { get; set; } public int UserId { get; set; } public string Token { get; set; } = string.Empty; public DateTime ExpiresAt { get; set; } public DateTime CreatedAt { get; set; } = DateTime.UtcNow; public DateTime? RevokedAt { get; set; } public bool IsExpired => DateTime.UtcNow >= ExpiresAt; public bool IsRevoked => RevokedAt != null; public bool IsActive => !IsRevoked && !IsExpired; // Navigation properties public User User { get; set; } = null!; }