add missing decrypt of member before deleting attendance

handlers/events.go

@@ -99,6 +99,7 @@ func (dh *DatabaseHandler) DeleteAttendeesFromEvent(newEvent models.Event) error
 
 	for _, newAttendee := range newEvent.Attendees {
 		for _, a := range event.Attendees {
+			a.Decrypt(dh.token)
 			if a.FirstName == newAttendee.FirstName && a.LastName == newAttendee.LastName {
 				dh.database.DeleteRelation(&event, a, "Attendees")
 			}