Twitter API for Non-public/organic/promoted metrics in Google Script

Question

I'm trying to use the Twitter API in Google Script to get the non-public metrics of my posts. I believe have done all of the authentication properly since I am able to get the information when using Postman. I have generate a consumer_key, a consumer_secret, an access_token, and a token_secret. According to the twitter documentation , I MUST use Oauth1.0 (https://developer.twitter.com/en/docs/twitter-api/metrics).

In order use the Oauth1, I used Google's own script for Twitter Oauth1 (https://developers.google.com/google-ads/scripts/docs/examples/twitter-oauth10).

I was able to take that code (along with the library it required) and successfully retrieve the tweets for my username.

My attempt to get the non_public metric was replacing the "https://api.twitter.com/1.1/statuses/user_timeline.json" with the GET request I had from POSTMAN but it returned a "401 error".

I have a hunch that I can't just replace that url with my own but I am unsure how to approach it.

In summary:

1. Tokens/Twitter Authorization/GET request are written properly since they work in Postman
2. Google Script is writing properly since the default URL works
3. Unsure how to replace the default url to accomplish different tasks