curl --request GET \
  --url https://api.leen.dev/v1/entities/device-groups \
  --header 'X-API-KEY: <api-key>' \
  --header 'X-CONNECTION-ID: <api-key>'

{
  "count": 123,
  "total": 123,
  "items": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "description": "<string>",
      "created_by": "<string>",
      "vendor_id": "<string>",
      "vendor_created_at": "2023-11-07T05:31:56Z",
      "vendor_data": {},
      "vendor": "<string>",
      "device_ids": [
        "3c90c3cc-0d44-4b50-8888-8dd25736052a"
      ]
    }
  ]
}