dotenv
$ npm install dotenv
//--------------------
on file .env
//--------------------
DB_HOST=localhost
DB_USER=root
DB_PASS=s1mpl3
DB_NAME=banco_de_dados
DB_PORT=3306
//--------------------
import the config from .env file
//--------------------
require('dotenv').config()
module.exports = {
username:process.env.DB_USER,
password:process.env.DB_PASS,
database:process.env.DB_NAME,
host:process.env.DB_HOST,
dialect:"mysql"
}