public string ToYAMLInsert()
        {
            var sb = new StringBuilder();

            sb.AppendFormat("id: {0}", Id);
            sb.AppendLine();
            sb.AppendLine("model: user");
            sb.AppendFormat("pseudo: {0}", Name);
            sb.AppendLine();
            sb.AppendFormat("email: {0}", MailAddress.GetSafeRails(true));
            sb.AppendLine();
            sb.AppendFormat("password: {0}", Password.GetSafeRails(true));
            sb.AppendLine();
            sb.AppendFormat("created_at: {0}", CreationDate);
            sb.AppendLine();
            sb.AppendFormat("updated_at: {0}", LastUpdate);
            sb.AppendLine();
            sb.AppendFormat("role: :staff");
            sb.AppendLine();
            return(sb.ToString());
        }