def create_shipping_address(self, shipping_address):
        """Creates a shipping address on an existing account. If you are
        creating an account, you can embed the shipping addresses with the
        request"""
        url = urljoin(self._url, '/shipping_addresses')
        return shipping_address.post(url)
Creates a shipping address on an existing account. If you are
        creating an account, you can embed the shipping addresses with the
        request