Ionic 4 Adding Ticket/QRImage to Apple Wallet

I’m Generating QR codes after a ticket purchase. I want to store these QR codes to Apple Wallet.

I’ve used ionic-native apple-wallet plugin, But the documentation doesn’t give enough info on how to store QR image in apple wallet.

import { AppleWallet } from '@ionic-native/apple-wallet/ngx';

 .then((res: boolean) => {
    Expect res to be boolean
 .catch((err) => {
    Catch {{err}} here

The documentation lets add/remove a card, but doesn’t have documentation on adding a QR to Apple Wallet.