What is the correct way to add a public ssh key?

General questions
1

In other Linux platforms, I would add my SSH RSA public key to the ~/.ssh/authorized_keys file. But when I go in to the VyOS .ssh/authorized_keys file, it says:

vyos@VYOS# cat .ssh/authorized_keys
# Automatically generated by Vyatta configuration
# Do not edit, all changes will be lost

What is the correct way to add a key in VyOS that will survive a reboot?