{
    "ted": "123321",
    "bear": "123456"
}

var app  = require('express')(),
    auth = require('express-json-auth')(); // default path: process cwd dir + user.json
 
// throughout the app
app.use(auth);
 
// through a route
app.get('/admin', auth, function (req, res) {
    res.send('Logged!');
});

...
auth = require('express-json-auth')('./private/admin.json');
...

...
users = {
    "ted": "123321",
    "bear": "123456"
},
auth  = require('express-json-auth').plain(users);
...