When it comes to  POS apps, as all the users use the same device, we’ll assign the same ID to all of them. However, if you want to differentiate users based on, for instance, their loyalty card number, you can send this information to UXCam as event and event property, for example:

Event: loyalty_card_number_entered
Event property: 1234EXAMPLE (different for each loyalty card)

This way you’ll be able to find sessions for specific users.