curl --request POST \
  --url https://production.runalloy.com/headless/credentials \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: application/json' \
  --header 'x-api-version: <x-api-version>' \
  --data '{
  "userId": "string",
  "credential": {
    "type": "netsuite",
    "data": {
      "realm": "XXX",
      "consumerKey": "XXX",
      "tokenId": "XXX",
      "tokenSecret": "XXX"
    }
  }
}'

{
  "success": true,
  "credentialId": "63252d14cc29df15cc481a76"
}