public function sslCertificateInvalid(SSLCertificateMonitor $sslCertificateMonitor)
{
$this->sendNotification('whenSSLCertificateInvalid', "SSL Certificate Invalid: {$sslCertificateMonitor->getUrl()}", "SSL Certificate is invalid for {$sslCertificateMonitor->getUrl()}. Certificate domain is {$sslCertificateMonitor->getCertificateDomain()}. Certificate expiration date is {$sslCertificateMonitor->getCertificateExpiration()} ({$sslCertificateMonitor->getCertificateDaysUntilExpiration()} days).", BaseSender::TYPE_ERROR);
}