protected function sendRequest()
    {
        if ($this->nextToken) {
            $this->command->set('page', $this->nextToken);
        }

        $result = $this->command->execute();
        $currentToken = $result['paging']['page'];
        $this->nextToken = $result['paging']['pages'] > $currentToken ? ++$currentToken : false;

        return $result['files'];
    }