docs: public List<CoinbasePaymentMethod> getCoinbasePaymentMethods() throws IOException {
      String apiKey = exchange.getExchangeSpecification().getApiKey();
      BigDecimal timestamp = coinbase.getTime(Coinbase.CB_VERSION_VALUE).getData().getEpoch();
  
      return coinbase
          .getPaymentMethods(Coinbase.CB_VERSION_VALUE, apiKey, signatureCreator2, timestamp)
          .getData();
    }