REST GET: Not working for Smartsheet API

Hi,

I’m trying to fetch data from a sheet using Smartsheets sheets API. I’ve generated the access token, and it’s working fine with Postman. Please see below it’s returning the data, but when I do the same using Rest Get, it’s not producing anything.

And also, with Smartsheets API, even if I pass the wrong sheetid its starts validating and does not throw any error. If it’s working in POSTMAN, it should work with REST Get also. Please let me know what I’m missing.

Note: I’ve also tried using the Oauth2 method by creating an account for Smartsheets, and I was able to refresh the token as well, but with that approach, it is also not working.