Now, we are able to test the code using
Usage: npm <command>

where <command> is one of:
    add-user, adduser, apihelp, author, bin, bugs, c, cache,
    completion, config, ddp, dedupe, deprecate, docs, edit,
    explore, faq, find, find-dupes, get, help, help-search,
    home, i, info, init, install, isntall, la, link, list, ll,
    ln, login, ls, outdated, owner, pack, prefix, prune,
    publish, r, rb, rebuild, remove, restart, rm, root,
    run-script, s, se, search, set, show, shrinkwrap, star,
    start, stop, submodule, tag, test, tst, un, uninstall,
    unlink, unpublish, unstar, up, update, version, view,
    whoami

npm <cmd> -h     quick help on <cmd>
npm -l           display full usage info
npm faq          commonly asked questions
npm help <term>  search for help on <term>
npm help npm     involved overview

Specify configs in the ini-formatted file:
    /Users/shovon/.npmrc
or on the command line via: npm <command> --key value
Config info can be viewed via: npm help config

npm@1.2.0 /usr/local/lib/node_modules/npm.