npm logout [--registry=<url>] [--scope=<@scope>]
When logged into a registry that supports token-based authentication, tell the server to end this token's session. This will invalidate the token everywhere you're using it, not just for the current environment.
When logged into a legacy registry that uses username and password authentication, this will clear the credentials in your user configuration. In this case, it will only affect the current environment.
Default: The scope of your current project, if any, otherwise none.
If specified, you will be logged out of the specified scope. See npm help scope.
npm logout --scope=@myco