create index.js file with following content.
exports.printMsg = function() {
console.log("This is a message from the demo package at LogisticInfotech");
};
Step 3
Enable two factor authentication in npmjs account profile
Need to use google authenticator app in ios/android
Step 4
$ npm adduser
Step 5
make sure your package name is unique. Other wise it will give error like
You do not have permission to publish "testpackage". Are you logged in as the correct user? : testpackage
$ npm publish --access=public