curl --request GET \
  --url https://api.returnshelper.com/uat/user/api/ApiBalance/GetApiBalance \
  --header 'x-rr-apikey: <api-key>' \
  --header 'x-rr-apitoken: <api-key>'

{
  "totalNumberOfRecords": 123,
  "apiBalances": [
    {
      "apiBalanceId": 123,
      "currencyCode": "<string>",
      "balance": 123
    }
  ]
}