const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({store_credit_category: {name: 'refunded'}})
};

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

curl --request POST \
  --url http://{defaultHost}/api/v2/platform/store_credit_categories \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "store_credit_category": {
    "name": "refunded"
  }
}
'

{
  "data": {
    "id": "6",
    "type": "store_credit_category",
    "attributes": {
      "name": "Exchange",
      "created_at": "2022-11-08T19:35:34.099Z",
      "updated_at": "2022-11-08T19:35:34.099Z"
    }
  }
}

{
  "error": "Name can't be blank",
  "errors": {
    "name": [
      "can't be blank"
    ]
  }
}