Retrieve a group

curl --request GET \
  --url https://api.amberflow.io/v1/groups/{group_id} \
  --header 'X-API-Key: <api-key>'

{
  "id": "c553e4e0-d8a4-4af9-8386-0e788578d028",
  "created_at": "2024-09-23T00:00:00.000Z",
  "name": "Spot price customers",
  "bidding_zone": "NL"
}