By default, this role configures a cron job to run under the provided user account at the given hour and minute, every day. The defaults run `certbot-auto renew` via cron every day at 03:30:00 by the user you use in your Ansible playbook. It's preferred that you set a custom user/hour/minute so the renewal is during a low-traffic period and done by a non-root user account.
After installation, you can create certificates using the `certbot-auto` script, which by default is installed inside the configured `certbot_dir`, so by default, `/opt/certbot/certbot-auto`. Here are some example commands to configure certificates with Certbot:
# Automatically add certs for all Apache virtualhosts (use with caution!).
/opt/certbot/certbot-auto --apache
# Generate certs, but don't modify Apache configuration (safer).