alindinca, Are you meaning the SSH key login? Since I've moved to GCP, I've struggled getting to the core joomla files. I've only been able to use FileZilla with SFTP with the the SSH keys. Is that the info you need? As well, when I do login with FileZilla I'm not able to enter the HTDOCS folder through Bitnami.
But I'll gladly send what you need, if that's what you need.