Why can't connect to mysql?

Question

Node.js

I installed the mysql package, did everything according to the instructions, but

const http = require('http');
const mysql = require("mysql");

const connection = mysql.createConnection({
  host : "localhost",
  user : "root",
  password : "password"
});

connection.connect(function(e) {
  if(!!e) {
    console.log(e);
  }
  else {
    console.log("Connected");
  }
});


http.createServer(function (req, res) {
  res.write('Hello World!'); 
  res.end();
}).listen(8080);