code: def list_cards(self, *args, **kwargs):
          
          return payplug.Card.list(self, *args, **kwargs)
docs: List the cards of the customer.
  
          :param page: the page number
          :type page: int|None
          :param per_page: number of customers per page. It's a good practice to increase this number if you know that you
          will need a lot of payments.
          :type per_page: int|None
          :return: The cards of the customer
          :rtype APIResourceCollection