Node JS for Youtube search. Why is the log empty?

Question

npm

NPM Module " youtube-search " link
..... for Node JS (version 12.18.3) searches
for 500 videos for the search term "music" and logs the results.

Youtube APIv3 key: AIzaSyALTsN37OKneqTEQskMWVLb32Cumv-3bGc

Why doesn't it show anything in the log?

Don't kick too hard, I'm far from manually writing code in JS.

The code:

var search = require('youtube-search');

var opts = {
  maxResults: 500,
  key: 'AIzaSyALTsN37OKneqTEQskMWVLb32Cumv-3bGc'
};

search('музыка', opts, function(err, results) {
  if(err) return console.log(err);

 = results

  console.dir(results);
});

to output the result to the console, my interpreter software needs to write the result to a variable.

like this, but my soft interpreter says that the RESULTAT variable is not defined