authorization: ********************curl --location --request GET '//groups/' \
--header 'authorization: <api-key>'{
"id": 0,
"name": "string",
"groupId": "string",
"groupIdClient": "string",
"instanceId": "string",
"contacts": [
"string"
],
"created_at": "2019-08-24T14:15:22.123Z",
"updated_at": "2019-08-24T14:15:22.123Z"
}