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>> npm adduser --registry http://localhost:4873
Username: admin123
Password: qazwsx
Email: (this IS public) anemail@gmail.com
npm ERR! registry error parsing json
npm ERR! registry error parsing json
npm ERR! registry error parsing json
npm ERR! Windows_NT 6.1.7601
npm ERR! argv "C:\Program Files\nodejs\node.exe" "C:\Users\37870\AppData\Roaming\npm\node_modules\npm\bin\npm-cli.js" "adduser" "--registry" "http://localhost:4873"
npm ERR! node v4.4.7
npm ERR! npm  v3.10.5

npm ERR! Unexpected token <
npm ERR! <HEAD><TITLE>Unknown Host</TITLE></HEAD>
npm ERR! <BODY BGCOLOR="white" FGCOLOR="black"><H1>Unknown Host</H1><HR>
npm ERR! <FONT FACE="Helvetica,Arial"><B>
npm ERR! Description: Unable to locate the server named "<em>localhost</em>" --- the server does not have a DNS entry.  Perhaps there is a misspelling in the server name, or the server no longer exists.  Double-check the name and try again.</B></FONT>
npm ERR! <HR>
npm ERR! <!-- default "Unknown Host" response (504) -->
npm ERR! </BODY>
npm ERR!
npm ERR!
npm ERR! If you need help, you may report this error at:
npm ERR!     <https://github.com/npm/npm/issues>