user ID for this certificate will be the ssh service URI for the host,
which by default is based on the output of `hostname -f`
(eg. `ssh://server.example.net`). If the name determined from
`hostname -f` is not the name you want to have in the service URI,
user ID for this certificate will be the ssh service URI for the host,
which by default is based on the output of `hostname -f`
(eg. `ssh://server.example.net`). If the name determined from
`hostname -f` is not the name you want to have in the service URI,