WooCommerce Nodejs Response Error

I am trying to get a product detail from WordPress woo-commerce store. For that i am using nodejs woo-commerce module
But when i make a request i get the following error from server

{"status":"FAIL","message":"Invalid Signature - provided signature does not match"}

and 401 Unauthorized

But when i tried the same thing with php WooCommerce-REST-API-Client-Library which is using curl, i got the desired result.

I have searched different things, even compared the headers and url parameters etc, for both php and nodejs reqeust.
I have also tried this with nodejs curlrequest module.

Can anybody please guide me in the right direction.

I am passing the following options to node module:

{
  url:'my-woocommerce.com', 
  port:'81', 
  consumerKey:'ck_402b945d4b8a5017bb507df68295e833', 
  secret:'cs_5ac59207f8cb8c444ca4c4336ccc84e1'
}