Thanh toan bang momo user transfer qua openpos. Xac nhan thu cong. #1: admin/pos/setting/payment method setting / kich hoat MOMO cho POS, sau khi save, 1 truong ma bi mat hien thi, dien ma nay de hoan thanh giao dich ngoai pos #2. admin/pos/register/ chon register, edit va dien thong tin tai khoan nhan tien. #3. logout and login pos again
