curl --request GET \
  --url https://api.unibee.dev/merchant/subscription/config \
  --header 'Authorization: Bearer <token>'

{
  "code": 123,
  "data": {
    "config": {
      "downgradeEffectImmediately": true,
      "fiatExchangeApiKey": "<string>",
      "gatewayVATRule": "<string>",
      "incompleteExpireTime": 123,
      "invoiceEmail": true,
      "invoicePdfGenerate": true,
      "showZeroInvoice": true,
      "tryAutomaticPaymentBeforePeriodEnd": 123,
      "upgradeProration": true
    }
  },
  "message": "<string>",
  "redirect": "<string>",
  "requestId": "<string>"
}