Node.js OAuth2: Get Google+ activities

From today I'm not able to retrieve my Google+ activities by placing a GET request to this url:

https://www.googleapis.com/plus/v1/people/me/activities/public?key={API_KEY}

I'm getting a 401 error. So I tried to sign the request using the node.js oauth2 library, including a pre-generated user token, but I'm getting the same error. The js code for my test script is:

var OAuth2 = require('oauth').OAuth2,
    GOOGLEPLUS_APP_ID = {APP_ID},
    GOOGLEPLUS_APP_SECRET = {APP_SECRET},
    accessToken = {USER_TOKEN};

var _oauth2 = new OAuth2(GOOGLEPLUS_APP_ID, GOOGLEPLUS_APP_SECRET, '',
'https://accounts.google.com/o/oauth2/auth',
'https://accounts.google.com/o/oauth2/token');

_oauth2.get('https://www.googleapis.com/plus/v1/people/me/activities/public?key={API_KEY}',
accessToken, function (err, body, res) {
    if (err) {
        console.log('error:');
        console.log(err);
    }
    else console.log(body);
});

I placed the same request to get the basic user info (url: https://www.googleapis.com/oauth2/v1/userinfo) and works OK.

Can you please assist me with this?

Thank you.

If you have the access token already you should be able to use {?|&}access_token=X to get the result, example below.

var accessToken = 'XYZ';
require('http').get('https://www.googleapis.com/plus/v1/people/me/activities/public?access_token=' + accessToken, function(result){
    //Use result here!
});

More information can be found within the Google+ API (Common Parameters) section