/usr/local/lib/node_modules/npm/bin
npm cache clean --force to clean out unnecessary copies of older package versions. NPM claims that it manages everything properly but they obviously never migrated multiple projects from a public repo to a private repo.
npm config set registry => introduce new registry to npm
npm adduser => add a new user for the new registry
"publishConfig": { "registry": "" }, =>. add to your package.jsons so NPM knows