Get a list of app users

URL: GET /api/v1/appusers[?name=<appuser_name>]

Content: None

Returns: A list of App Users flitered by appuser_name, if supplied.

Get an app user by ID

URL: GET /api/v1/appusers/<appuser_id>

Content: None

Returns: A single App User whose ID is appuser_id.