Can't get access token and shop info

[krutipatel-8794]

I am trying to get an access token using exchange_temporary_token method but I don't get any error or any successful response.
I am implementing this node API in the AWS Lambda function.

var Shopify = new shopifyAPI({
				 shop: 'SHOP_NAME', 
				 shopify_api_key: 'API_KEY', // Your API key
				 shopify_shared_secret: 'API_SHARED_SECRET'// Your Shared Secret
			 });

Shopify.exchange_temporary_token(event['queryStringParameters'], function (err, data){
	if (err)
	{
		console.log(err);
	}
	else {
		console.log(data);
	}

	console.log('Access token is..', data['access_token']);
});

I am using the correct shopify_api_key and shopify_shared_secret, but I can't see any error OR any data result OR access_token.
I can successfully call Shopify.is_valid_signature method and it is returning 'True' value.
Any suggestions for this on how I can get the details?

My 2nd question is:
I have also tried to call the below code, and the same issue (No errors, no data, no headers). I am calling this by setting my temporary token in the config

var Shopify = new shopifyAPI({
				 shop: 'SHOP_NAME', 
				 shopify_api_key: 'API_KEY', // Your API key
				 shopify_shared_secret: 'API_SHARED_SECRET', // Your Shared Secret
                                 access_token: event['queryStringParameters'].code
			 });

Shopify.get('admin/api/2022-07/shop.json', "", function(err, data, headers){
                console.log(err); 
                console.log(data); // Data contains product json information
                console.log(headers); // Headers returned from request
            });

As per the docs the 2nd parameter query_params is optional so I haven't passed any.
Could you please suggest how I can get the shop details?

[nodeit]

It's hard to tell without any sort of stack trace or error message. Are you able to reproduce the error locally? Testing in AWS lambda can be tricky.

[krutipatel-8794]

No, I haven't tested this locally and only tried with Lambda. But I can try testing locally and will let you know.

[krutipatel-8794]

@nodeit I have tested this locally and I can get an access token but when I try the same code in lambda then it does not return an error or data. I feel like it doesn't execute the method itself. Do you know if anyone had the same issue before and has a resolution?

await Shopify.exchange_temporary_token(queryParams, async function(err, data){
                console.log("err is....", err);
                console.log("data is....", data);
                console.log("access token is....", data['access_token']);
                accessToken = data['access_token'];
});