wat.js

// Client from MongoDB

{
    "_id": {
        "$oid": "52ec25f12ebb928c81b4d2c8"
    },
    "name": "test",
    "redirect_uri": "http://localhost:3001/oauth_test",
    "trusted": true
}

...

OAuth.Client.findById(username, function (err, client) {
    ...
    console.log(JSON.parse(JSON.stringify(client)).trusted); // prints "true"
    console.log(client.get('trusted')); // prints "true"
    console.log(client.trusted); // prints "undefined"
}