how to connect sequelize to postgres code example

Example 1: new Sequelize('featherstutorial', 'databaseUser', 'databasePassword'

var sequelize = new Sequelize('database', 'username', 'password', {
  host: "my.server.tld",
  port: 12345
})

Example 2: new Sequelize('featherstutorial', 'databaseUser', 'databasePassword'

var sequelize = new Sequelize('mysql://user:[email protected]:9821/dbname', {
  // Look to the next section for possible options
})

Example 3: new Sequelize('featherstutorial', 'databaseUser', 'databasePassword'

var sequelize = new Sequelize('database', 'username'[, 'password'])