Create QR codes for subscribers or members

We are performing testing with Alf.io to provide tickets for our volleyball team, beside the one day tickets for one game, it would be great to make a QR code that is valid for all events from one Organization so that we can make a pass valid for a certain period or serie of events.

Technicly, I would consider making a range of categories that you then can select for the event so you can select the category where a subscription was ordered for. Next to that I would make an option where you can specify a validity period. Someone pays for a pass and can come to all the events between date A and date B.

An advantage would be that you also can give your members a QR code so that they also can be scanned when entering the venue, in such a way you have perfect numbers for the amount of spectators/attendees.