Pushover configuration?

Furry 5 hours ago

I have Traccar running as an app in TrueNAS Scale, and I would like to use Pushover for notifications.

The User has attributes added, and filled, for Pushover User Key (I have entered a Pushover API key here) and Pushover Device Name.

But my server does not have a Channel for Pushover; it only has Web and Email.

How can I add this type? I do not have 'easy' access to configuration (.xml), as it's an app in TrueNAS. Maybe there is an 'environment variable' that I could define, in the TrueNAS configuration for this app? Or...?

Thank you.