How to use 1P to store Loyalty Card details and have displayed as Barcode/QR Code?

I use 1P to store logins to my favourite stores where I have online accounts.  I also want to store my loyalty card in 1P instead of google wallet.  I would like to plug in my loyalty card number and have it represented as a barcode or QR code based on selection/preference so when I get to the store it can be scanned.  So much easier than finding the right app that hold my loyalty card.  I use 1P all day everyday to access these systems, I want to do the same thing for every store.

How can I do that?