mikrotik hotspot login voucher

Hello everyone, I want to create QR code in hotspot server by make voucher user name and password, When the users can login by 2 ways (step 1 can login by user name and password by created in user manger, Step 2 the users can login by using QR code by create the voucher so in this step the user can download app in mobile like "ok scan" to . cimbclick login . mandiri mcm login