Create a Classification

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({classification: {product_id: '1', taxon_id: '1', position: 1}})
};

fetch('http://{defaultHost}/api/v2/platform/classifications', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "data": {
    "id": "5",
    "type": "classification",
    "attributes": {
      "position": 1,
      "created_at": "2022-11-08T19:33:58.099Z",
      "updated_at": "2022-11-08T19:33:58.099Z"
    },
    "relationships": {
      "product": {
        "data": {
          "id": "13",
          "type": "product"
        }
      },
      "taxon": {
        "data": {
          "id": "10",
          "type": "taxon"
        }
      }
    }
  }
}