Set up Google Index API. Need to check!

Hello. The goal of the script for sending pages to Google's search index: https://github.com/swalker-888/google-indexing-api-bulk
Various info from Google: https://developers.google.com/search/apis/indexing-api/v3/using-api?hl=ru
I have attached the log!
There is a complete instruction! After I sent the pages to the index. I received the following response: 

Content-Type: application/http

Content-ID: response-

HTTP/1.1 200 OK

FULL RESPONSE ON THE SCREEN. 

What I don't like? And what needs to be checked. Firstly, the response in the author's screenshot in his instructions is slightly different. See screenshot 2. There are fields that I don't have in my response. Like: "Latest Update, and "type" URL_UPDATET = this type of information probably indicates that Google took the page into account for indexing and will scan it. I don't have that written. Just code 200. 
And most importantly! It has been 3 days since I sent 100 pages through this script, and in 3 days not a single one has been taken into the index, not even started indexing. And Google itself states in its documentation that a 200 response is good, and that the bot has taken the page for indexing. But in the end, I can't verify this anywhere. There is no log in the script. I have a Google Cloud API account, I took the JSON info for connection, key, and so on from there, I thought I would see it in the logs, but I opened them and didn't see anything substantial. Maybe I should read them with you. I need to be absolutely sure that the script works, that Google definitely responded that it accepted the page at least for consideration! Because right now it's unclear what's happening. In my log in the editor and compiler where I compiled this script, there is information that maybe something needs to be updated, some libraries, maybe because of them I don't see normal detailed information that Google is taking my pages into account like Last Update and so on.
I will give you the code in the archive with the script. One page for testing. If you can update something in it. Bring some clarity to it, so that I can see in the console when I run it that Google really took my pages into account.  
To give you the code of my script. I need you to look at the screenshots, check the attached log. Think about what needs to be done, or maybe everything is fine, just libraries need to be updated, or something needs to be replaced. And write a reasonable proposal. What you understood about the problem. The task seems more than clear. And I want to note! Is it enough for you to update the code in my script? And return it to me. Or maybe I need to write some commands on my PC. Because the libraries need to be downloaded not to your PC, but to mine. Because then the script won't work on my end.