public function getStats( $db, $date_start = null, $date_end = null, $precision = null, array $fields = []){
        $QueryParameters = $this->buildQuery( $db, $date_start, $date_end, $precision, $fields);
        $rest = $this->getService( self::API_RDD);
        $rest->GET( $QueryParameters);

        return $rest->getResult();
    }