Server access – There must be a better way

So I've setup a couple of servers on Hetzner. One in particular selfhosts Sentry, Grafana,(Prometheus and Loki). My SSH key is provisioned... I need help with DevOps... but there seems to be no simple way to provision another SSH key. Support suggested this: "1. Go to the Rescue section of your server, but instead of the (reset root password) button, click the Activate Rescue & Reset button. Your server will then boot into the rescue system. 2. Connect to your server via SSH using the Rescue credentials. 3. execute the following commands in Rescue: mount /dev/sda1 /mnt chroot-prepare /mnt chroot /mnt From this point you can now navigate through the file structure of your Cloud Servers primary disc. SSH keys for the root user are stored in /root/.ssh/authorized_keys. 4. Restart your server using the reboot command and log in using the new SSH key." But seems pretty scary process on a server running multiple application. There must be a better way!