function createSigningRequest($url, $keyPath, $csrPath, $confPath)
    {
        $this->cli->runAsUser(sprintf(
            'openssl req -new -key "%s" -out "%s" -subj "/C=/ST=/O=/localityName=/commonName=%s/organizationalUnitName=/emailAddress=%s%s/" -config "%s"',
            $keyPath, $csrPath, $url, $url, '@laravel.valet', $confPath
        ));
    }