curl --request GET \
  --url https://api.chift.eu/consumers/{consumer_id}/invoicing/products

{
  "items": [
    {
      "id": "<string>",
      "source_ref": {
        "id": "<string>",
        "model": "<string>"
      },
      "name": "<string>",
      "unit_price": 123,
      "tax_id": "<string>",
      "code": "<string>",
      "unit": "<string>",
      "category": "<string>",
      "currency": "<string>",
      "description": "<string>",
      "cost": 0,
      "available_quantity": 0
    }
  ],
  "total": 1,
  "page": 2,
  "size": 2
}