docs: public void marshall(InitiateAuthRequest initiateAuthRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (initiateAuthRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(initiateAuthRequest.getAuthFlow(), AUTHFLOW_BINDING);
              protocolMarshaller.marshall(initiateAuthRequest.getAuthParameters(), AUTHPARAMETERS_BINDING);
              protocolMarshaller.marshall(initiateAuthRequest.getClientMetadata(), CLIENTMETADATA_BINDING);
              protocolMarshaller.marshall(initiateAuthRequest.getClientId(), CLIENTID_BINDING);
              protocolMarshaller.marshall(initiateAuthRequest.getAnalyticsMetadata(), ANALYTICSMETADATA_BINDING);
              protocolMarshaller.marshall(initiateAuthRequest.getUserContextData(), USERCONTEXTDATA_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }