docs: public void marshall(ProviderUserIdentifierType providerUserIdentifierType, ProtocolMarshaller protocolMarshaller) {
  
          if (providerUserIdentifierType == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(providerUserIdentifierType.getProviderName(), PROVIDERNAME_BINDING);
              protocolMarshaller.marshall(providerUserIdentifierType.getProviderAttributeName(), PROVIDERATTRIBUTENAME_BINDING);
              protocolMarshaller.marshall(providerUserIdentifierType.getProviderAttributeValue(), PROVIDERATTRIBUTEVALUE_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }