Unless you will be able to generte the boarding pass in the Wizzair app or website, all 3 would need to pick-up the boarding passes at the check-in counters. 1 person can't get boarding passes for the 2 others. For a flight to AUH I think there is a high chance that a document check will be required at the check-in counters and you can't generate boarding pass yourself (but admittedly no first hand experience).