code: def __transfer(self, client_id, client_secret, cc_number, expiration_month,
                     expiration_year, user_name, email, address, **kwargs):
          
          params = {
              'client_id': client_id,
              'client_secret': client_secret,
              'cc_number': cc_number, 
              'expiration_month': expiration_month,
              'expiration_year': expiration_year,
              'user_name': user_name,
              'email': email,
              'address': address
          }
          return self.make_call(self.__transfer, params, kwargs)
docs: Call documentation: `/credit_card/transfer
          <https://www.wepay.com/developer/reference/credit_card#transfer>`_, plus
          extra keyword parameter:
          
          :keyword bool batch_mode: turn on/off the batch_mode, see 
             :class:`wepay.api.WePay`
  
          :keyword str batch_reference_id: `reference_id` param for batch call,
             see :class:`wepay.api.WePay`
  
          :keyword str api_version: WePay API version, see
             :class:`wepay.api.WePay`