Get placeId of an authenticated GooglePlus user in NodeJs

I'm currently making a node-js app which uses Google API (google-api-nodejs-client).

All works fine, I can fetch user data using this code for my redirect url :

//from ./lib/google.js
var googleapis = require('googleapis');
var OAuth2 = googleapis.auth.OAuth2;
var client = new OAuth2('clientId', 'clientSecret', '/oauth2callback');
var plus = googleapis.plus('v1');
exports.client = client;
exports.plus = plus;

//from app.js
var gapi = require('./lib/google');
app.get('/oauth2callback', function (req, res){
    var code = req.query.code;
    gapi.client.getToken(code, function (err, tokens) {
        gapi.client.setCredentials(tokens);
        gapi.plus.people.get({userId: 'me', auth: gapi.client}, function (err, resp){
            //use the resp object to get user data we want...
        });
    });
});

For example, on my Google Plus account, I have one Business Page of my company. This page has an ID, and the address of the company is visible on Google Maps (using Google Places) which is an other PlaceID.

My question is how can we get these IDs ? My app must be able to show at least the name of the company linked to the current Google Plus account of the user.

Thank you !