In order to log in via the kiosk, every volunteer must have a Kiosk user ID (PIN) and, if you are requiring it, a Kiosk password. The user ID and password can be entered manually on the Web/kiosk panel in the Profile editor, imported using the Interactive File Importer, or entered by the volunteers themselves on an application form. Or you could provide your volunteers with a swipeable (magnetic stripe) or scannable (barcode) credential. See Name Tags, Badges and Credentials for how to create a scannable credential.