public function addKey(PreFileDownloadEvent $event)
{
$processedUrl = $event->getProcessedUrl();
if ($this->isAcfProPackageUrl($processedUrl)) {
$rfs = $event->getRemoteFilesystem();
$acfRfs = new RemoteFilesystem($this->addParameterToUrl($processedUrl, 'k', $this->getKeyFromEnv()), $this->io, $this->composer->getConfig(), $rfs->getOptions(), $rfs->isTlsDisabled());
$event->setRemoteFilesystem($acfRfs);
}
}