What would be the correct way to start the Express vpn client at boot detailed here
Specifically;
In the terminal, run the following command:
expressvpn connect
I would want this to run at boot unattended. Research indicates there are many methods of starting things at boot from crontab to init.d to creating a service, etc.
I am after the "correct" way to achieve the running this at boot within the 18.04 ecosystem.