Incorrect username/password crashes program

[nerdenough]

Using an incorrect username/password in the config causes the following error to occur:

SyntaxError: Unexpected end of input
    at Object.parse (native)
    at restCallbackHandler (...\node_modules\servicenow\servicenow.js:291:18)
    at Request._callback (...\node_modules\servicenow\servicenow.js:142:9)
    at Request.self.callback (...\node_modules\servicenow\node_modules\request\request.js:121:22)
    at emitTwo (events.js:87:13)
    at Request.emit (events.js:172:7)
    at Request.<anonymous> (...\node_modules\servicenow\node_modules\request\request.js:978:14)
    at emitOne (events.js:82:20)
    at Request.emit (events.js:169:7)
    at IncomingMessage.<anonymous> (...\node_modules\servicenow\node_modules\request\request.js:929:12)

npm ERR! Windows_NT 6.3.9600
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "start"
npm ERR! node v4.1.2
npm ERR! npm  v2.14.4
npm ERR! code ELIFECYCLE
npm ERR! start: `node app.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the start script 'node app.js'.
npm ERR! This is most likely a problem with the package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node app.js
npm ERR! You can get their info via:
npm ERR!     npm owner ls ...
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     ...\npm-debug.log

I found that adding in a status code check into the restCallbackHandler function, similar to that in your jsonServiceErrorProcessor function fixed the issue.

e.g. something like:

if (response.statusCode != 200) {
    callback(response);
    return;
}

Placing that in the servicenow.js just before JSON.parse(body) on line 291 fixes the problem.