Create a new Credit Note Line Item Group

curl --request POST \
  --url https://eu.sequencehq.com/api/credit-notes/{creditnote}/line-item-groups \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: application/json' \
  --data '{
  "lineItemGroupId": "af60cab3-812d-4250-a051-0fb7133a00c7",
  "title": "Users",
  "description": "Credit note for users"
}'

{
  "id": "e5bc0f12-4bc1-f821-bc2d-04639a16f9ec",
  "creditNoteId": "af60cab3-812d-4250-a051-0fb7133a00c7",
  "lineItemGroupId": "af60cab3-812d-4250-a051-0fb7133a00c7",
  "title": "Users",
  "description": "Credit note for users",
  "index": 2,
  "netTotal": "51.20",
  "totalTax": "2.50",
  "grossTotal": "101.23"
}