Add a registry user account
npm adduser [--registry=url] [--scope=@orgname]
Create or verify a user named <username> in the specified registry, and
save the credentials to the .npmrc file. If no registry is specified,
the default registry will be used (see npm-config(7)).
The username, password, and email are read in from prompts.
You may use this command to change your email address, but not username or password.
To reset your password, go to https://www.npmjs.org/forgot
You may use this command multiple times with the same user account to authorize on a new machine.
npm login is an alias to adduser and behaves exactly the same way.
Default: http://registry.npmjs.org/
The base URL of the npm package registry. If scope is also specified,
this registry will only be used for packages with that scope. See npm-scope(7).
Default: none
If specified, the user and login credentials given will be associated
with the specified scope. See npm-scope(7). You can use both at the same time,
e.g.
npm adduser --registry=http://myregistry.example.com --scope=@myco
This will set a registry for the given scope and login or create a user for that registry at the same time.