def get_all(self, page=None, per_page=None, include_totals=False):
        """Retrieves all resource servers

        Args:
            page (int, optional): The result's page number (zero based).

            per_page (int, optional): The amount of entries per page.

            include_totals (bool, optional): True if the query summary is
                to be included in the result, False otherwise.

        See: https://auth0.com/docs/api/management/v2#!/Resource_Servers/get_resource_servers
        """

        params = {
            'page': page,
            'per_page': per_page,
            'include_totals': str(include_totals).lower()
        }

        return self.client.get(self._url(), params=params)