Returns the time since the device at the specified site last reported its status.
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
The unique identifier for the site.
"d8f8f8f8-f8f8-f8f8-f8f8-f8f8f8f8f8f8"
The last seen time for the device.
A human-readable string indicating how long ago the device last checked in.
"2 minutes ago"