code: public static void setApiAndSecretKey(ExchangeSpecification exchangeSpec, String prefix) {
  
      Properties props = getSecretProperties(prefix);
  
      if (props != null) {
        exchangeSpec.setApiKey(props.getProperty("apiKey"));
        exchangeSpec.setSecretKey(props.getProperty("secretKey"));
      }
    }
docs: Read the API & Secret key from a resource called {@code prefix}-{@code secret.keys}. NOTE: This
  file MUST NEVER be commited to source control. It is therefore added to .gitignore.