How to authenticate node js application for using Advance Messaging Communication Service for WhatsApp messaging

Question

Hello,

I would like to use Azure Communication service for sending and receiving WhatsApp Messages in my node.js Application . I am following document

https://learn.microsoft.com/en-us/azure/communication-services/quickstarts/advanced-messaging/whatsapp/get-started?tabs=visual-studio%2Cconnection-string&pivots=programming-language-javascript

But while Authenticate Client (My Node Js Application) I am getting following error.

Failed to send message. Status code: 401

Error details: {

error: { code: 'Denied', message: 'Denied by the resource provider.' }

}

Someone please help me