def requests_usage(self, year=None, month=None):
        """
        Retrieves Cloudant requests usage data, optionally for a given
        year and month.

        :param int year: Year to query against, for example 2014.
            Optional parameter.  Defaults to None.  If used, it must be
            accompanied by ``month``.
        :param int month: Month to query against that must be an integer
            between 1 and 12.  Optional parameter.  Defaults to None.
            If used, it must be accompanied by ``year``.

        :returns: Requests usage data in JSON format
        """
        endpoint = '/'.join((
            self.server_url, '_api', 'v2', 'usage', 'requests'))
        return self._usage_endpoint(endpoint, year, month)
Retrieves Cloudant requests usage data, optionally for a given
        year and month.

        :param int year: Year to query against, for example 2014.
            Optional parameter.  Defaults to None.  If used, it must be
            accompanied by ``month``.
        :param int month: Month to query against that must be an integer
            between 1 and 12.  Optional parameter.  Defaults to None.
            If used, it must be accompanied by ``year``.

        :returns: Requests usage data in JSON format