using both track and follow parameter like "track=abc&follow=123,234" is not possible.
var Twit = require('twit');
var util = require('util');
var config =require('./config');
var T = new Twit(config)
var stream = T.stream('statuses/filter', { follow: ['56488059','2227355222'] , track: ['Covid','Corona'] , language: ['en'] });
stream.on('tweet', (tweet) => {
console.log(tweet)
console.log('---------------------')
}
);
it is an OR relationship. You will receive a Status object whether the keyword was present or the user id was involved (this includes other users tweeting to your followed user id).