GridDB node.js client database connection error

Question

I am following ThisDocument to install GridDB node.js client. But, stuck at last. The installation worked fine but during, Database connection process I got reference error. What reference does it require? What are the steps to connect grid DB instance with js? I used this code inside js file named n.js

var fs     = require('fs');
var factory = griddb.StoreFactory.getInstance();
var store = factory.getStore({
                        "host": process.argv[2],
                        "port": process.argv[3],
                        "cluster_name": process.argv[4],
                        "username": process.argv[5],
                        "password": process.argv[6]});

screenshot

I am following [ThisDocument ](https://griddb.net/en/blog/getting-started-with-the-griddb-nodejs-client/)to install GridDB node.js client. But, stuck at last. The installation worked fine but during, Database connection process I got reference error. What reference does it require? What are the steps to connect grid DB instance with js? I used this code inside js file named n.js