code: public static CompletableFuture<IMessageSender> createMessageSenderFromEntityPathAsync(URI namespaceEndpointURI, String entityPath, ClientSettings clientSettings)
      {
          return createMessageSenderFromEntityPathAsync(namespaceEndpointURI, entityPath, null, clientSettings);
      }
docs: Creates a message sender asynchronously to the entity using the client settings.
  @param namespaceEndpointURI endpoint uri of entity namespace
  @param entityPath path of entity
  @param clientSettings client settings
  @return a CompletableFuture representing the pending creating of IMessageSender instance