npm WARN adduser Incorrect username or password npm WARN adduser You can reset your account by visiting: npm WARN adduser npm WARN adduser http://admin.npmjs.org/reset npm WARN adduser npm ERR! Error: forbidden may not mix password_sha and pbkdf2 npm ERR! You may need to upgrade your version of npm: npm ERR! npm install npm -g npm ERR! Note that this may need to be run as root/admin (sudo, etc.)