docs: public void marshall(RegisterUserRequest registerUserRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (registerUserRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(registerUserRequest.getIdentityType(), IDENTITYTYPE_BINDING);
              protocolMarshaller.marshall(registerUserRequest.getEmail(), EMAIL_BINDING);
              protocolMarshaller.marshall(registerUserRequest.getUserRole(), USERROLE_BINDING);
              protocolMarshaller.marshall(registerUserRequest.getIamArn(), IAMARN_BINDING);
              protocolMarshaller.marshall(registerUserRequest.getSessionName(), SESSIONNAME_BINDING);
              protocolMarshaller.marshall(registerUserRequest.getAwsAccountId(), AWSACCOUNTID_BINDING);
              protocolMarshaller.marshall(registerUserRequest.getNamespace(), NAMESPACE_BINDING);
              protocolMarshaller.marshall(registerUserRequest.getUserName(), USERNAME_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }