How do I get the total count?

const { dataGridProps, search, filters } = useDataGrid<BaseRecord, HttpError, IShipmentFilterVariables>({
    pagination: {
      mode: 'server',
    },    
    initialPageSize: 10,
    onSearch: (params) => {
      const filters: CrudFilters = []
      const { q, type, search_term } = params