db-connection.js

require('dotenv').config();
const Sequelize = require('sequelize');

    var host= process.env.host;
    var user= process.env.user;
    var password= process.env.password;
    var database= process.env.database;

// connection
const sequelize = new Sequelize(database, user, password, {
      host: host,
      dialect: 'postgres',
}); 

module.exports = sequelize;