Retrieve all opportunities

curl --request GET \
  --url https://api.chift.eu/consumers/{consumer_id}/invoicing/opportunities \
  --header 'Authorization: Bearer <token>'

{
  "items": [
    {
      "id": "<string>",
      "source_ref": {
        "id": "<string>",
        "model": "<string>"
      },
      "name": "<string>",
      "total": 123,
      "probability": 123,
      "status": "open",
      "partner_id": "<string>",
      "comment": "<string>",
      "currency": "<string>",
      "description": "<string>",
      "pipe_status": "<string>",
      "pipe_name": "<string>",
      "created_date": "2023-12-25",
      "due_date": "2023-12-25",
      "end_date": "2023-12-25",
      "is_won": true,
      "owner_ref": {
        "id": "<string>",
        "model": "<string>",
        "name": "<string>"
      }
    }
  ],
  "total": 1,
  "page": 2,
  "size": 2
}