How to test the stripe webhook endpoint from POSTMAN

Question

import Stripe from 'stripe';




const stripKey = process.env.STRIPE_PRIVATE_KEY;
const stripe = new Stripe(stripKey, { apiVersion: '2023-10-16'});

export async function webhook (event) {
  console.log('Received Stripe Event:', event);

    const stripeEndpointKey = process.env.STRIP_ENDPOINT_KEY;
    let stripeEvent;
  
    if (stripeEndpointKey) {
      console.log("inside if stripeEndKey=======>", stripeEndpointKey)
        // Get the signature sent by Stripe
        const signature = event.headers['Stripe-Signature'];
        console.log("signature=========>", signature)
        try {
           stripeEvent = stripe.webhooks.constructEvent(
            event.rawBody,
            signature,
            stripeEndpointKey
          );
          console.log("stripeEvent-------->", stripeEvent);
        } catch (err) {
          console.log(`⚠️  Webhook signature verification failed.`, err.message);
        }
      }
  
      // Handle the specific event type
      switch (stripeEvent.type) {
        
        case 'checkout.session.completed':
          const paymentIntent = stripeEvent.data.object;
         // console.log('Received Stripe Event:', JSON.stringify(event, null, 2));

          console.log("pamyentintend====>",paymentIntent);
          console.log("testing the stripe event")
         // await handlePaymentSucceeded(stripeEvent.data.object);
          break;
        // Add more cases for other event types as needed
  
        default:
          console.log(`Unhandled event type: ${stripeEvent.type}`);
      }
  
      return { statusCode: 200, body: 'Webhook handled successfully' };
    }

above is my typescipt async function, I am using serverless framework.

I want to test the above endpoint using postman in the POST method I am passing raw body which is below.

{
    "type": "checkout.session.completed",
    "data": {
        "object": {
            "id": "session_id"
        }
    }
}

when I hit the API I am getting error in my console like :

Webhook signature verification failed. No signatures found matching the expected signature for payload. Are you passing the raw request body you received from Stripe?

I have tested the same endpoint using stripe CLI I followed below steps to test it from stripe CLI: stripe listen --forward-to http://localhost:3000/dev/v1/webhook --timeout 120 i added this endpoint to listen and after that in the another console I used below command: stripe trigger checkout.session.completed

after that i got response but when I am trying to test from postman I am getting signature error please help me to resolve this. I am trying to create webhook endpoint for the recurring payment.