You’re mixing up SmartApps and device functionality here.
You can use another app we’ve written to do that, a Smart App called “Trigger based Camera Pictures” which allows you to use triggers (motion sensors, contact/door sensors, momentary switches like door bells) to activate the Camera to take pictures and turn on switches and enable Camera monitoring optionally. The pictures will show up in your SmartThings camera device page.
It’s on the website under SmartApps