'Get audit log report
:param start_date: Start date for the report
:type  start_date: ``str`` in format YYYY-MM-DD
:param end_date: End date for the report
:type  end_date: ``str`` in format YYYY-MM-DD
:keyword location: Filters the node list to nodes that are
located in this location
:type    location: :class:`NodeLocation` or ``str``
:rtype: ``list`` of ``list``'

def ex_backup_usage_report(self, start_date, end_date, location):

    datacenter_id = self._location_to_location_id(location)
    result = self.connection.raw_request_with_orgId_api_1(('backup/detailedUsageReport?datacenterId=%s&fromDate=%s&toDate=%s' % (datacenter_id, start_date, end_date)))
    return self._format_csv(result.response)
