Retrieving device groups

Endpoint	Description
/device_groups	Retrieves a list of device groups
/device_groups/<id>	Retrieve device group by id

A device group contains the following data:

Field	Description	Type
device_groups.name	The name of this device group	String
device_groups.displayName	The name of this device group	String
device_groups.description	Description of this device group	String
device_groups.code		String
device_groups.createdDateTime	Date when this device group was created	Unix Timestamp
device_groups.lastUpdateDateTime	Date when this device group was updated	Unix Timestamp
device_groups.deviceList	List of device ids	List of Integer
device_groups.keyId	The id of this device group	Integer