Setting up QR Scanner to ad Profile file to user collection


I am in the proses of designing a business profile collection app,
I want to make use of a QR scanner to scan and add the selected Profile to the Users collection.

In the app I already have a Directory set up with the Profile information,
as a research option, and out of that they can add a profile to the User collection,
this works perfectly.

I now want the user to be able to scan a profile presented to them in the form of a QR code and then add this to there collection and open up the profile in there Collection!

What file format should I use attached to the QR Code, currently its a png file?

And how would I co about connecting the QR Scanner?

Any advice would be appreciated.

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