Yes, i know the bar code simply identifies the card as belonging to me and is used to access the “borg’s” database.That's probsbly on the database not the card, it's whatever they have collected. Perhaps you could get access thru freedom of information, not sure what all that accesses.
To fit actual information in a barcode the code would be huge.
Now the electronic chips in cards that is a different ballgame... those things are why you keep those cards in a rfid sleeve
Those chips can be in the realid and we may not know.