The account behind the supplied credentials. A 200 here is the confirmation that your key pair works, so call this before anything else. `orderPrefix` is the string every order id from this account begins with. isActive is always true in a 200: a suspended company is refused by the credential check before this action runs, so the suspension arrives as a 401 rather than as a field on a successful response. This previously documented a reads-still-work behaviour the API has never had.

{
  "success": true,
  "message": null,
  "data": {
    "merchantId": "3f8a1c9e42b74d6fa0e5c7b21d934e80",
    "companyId": 42,
    "companyName": "Nomad Home IP",
    "countryCode": "NL",
    "orderPrefix": "NOMAD",
    "isActive": true,
    "balance": 1284.5,
    "lifetimeCredited": 5000,
    "sellablePackages": 1873
  },
  "totalCount": 0,
  "page": 0,
  "pageSize": 0,
  "totalPages": 0,
  "stats": {}
}