public static void LoanPayment(int account_id, string name, double payment)
        {
            var attrValue = new Dictionary <System.Enum, Object>
            {
                { LoanEnt.account_id, account_id },
                { LoanEnt.name, name },
                { LoanEnt.payment, payment }
            };

            DB_IO.Update(DB_IO.DB_Interface.pr_loan_payment, attrValue);
        }
        public static void UpdateUser(string username, string email, string fname = null, string mname = null,
                                      string lname = null, string cardNo = null, int periodicity = 1, DateTime term = new DateTime(), bool?active = null)
        {
            var attrValue = new Dictionary <System.Enum, Object>
            {
                { UserEnt.user_name, username },
                { UserEnt.email, email },
                { UserEnt.fname, fname },
                { UserEnt.mname, mname },
                { UserEnt.lname, lname },
                { UserEnt.card_number, cardNo },
                { UserEnt.periodicity, periodicity },
                { UserEnt.term, term },
                { UserEnt.active_subscription, active }
            };

            DB_IO.Update(DB_IO.DB_Interface.pr_update_user, attrValue);
        }