def next_page_url(self):
        """
        :return str: Returns a link to the next_page_url or None if doesn't exist.
        """
        if 'meta' in self._payload and 'next_page_url' in self._payload['meta']:
            return self._payload['meta']['next_page_url']
        elif 'next_page_uri' in self._payload and self._payload['next_page_uri']:
            return self._version.domain.absolute_url(self._payload['next_page_uri'])

        return None
:return str: Returns a link to the next_page_url or None if doesn't exist.