Github API call fails after successful login

[VladyslavKurmaz]

Issue

Github API rejects simple API call GET /users after successful login
https://developer.github.com/v3/users/#get-a-single-user
API responce

{ error: null,
body: 'Request forbidden by administrative rules. Please make sure your request has a User-Agent header (http://developer.github.com/v3/#user-agent-required). Check https://developer.github.com for other possible causes.\n',
 status: 403,
 message: 'Forbidden' }

How to reproduce

• Login using github
• Call API endpoint /user

app.get('/api', function (req, res){
    oauth.auth('github', req.session, {
      credentials: req.session.credentials
    }).then(function (request_object) {
            return request_object.get('/user', {
            });
        })
        .then(function (r) {
           res.status(200).send('<pre>' + JSON.stringify(r) + '</pre>');
        })
        .fail(function (e) {
            res.status(400).send('An error occured while posting the message');
        });
});

package.json

  "dependencies": {
    "cors": "^2.8.4",
    "express": "^4.16.3",
    "express-session": "^1.15.6",
    "npm": "^5.8.0",
    "oauthio": "^0.3.5",
    "session-file-store": "^1.2.0",
    "to": "^0.2.9",
    "update": "^0.7.4"
  },
  "devDependencies": {
    "nodemon": "^1.17.2"
  }

request_object

{ access_token: 'xxxxxxxxxxxxxxxxx',
 token_type: 'bearer',
 request: 
 { url: 'https://api.github.com',
    cors: true,
       headers: { Authorization: 'Bearer {{token}}' } },
     state: 'xxxxxxxxxxxxxxxxx',
     provider: 'github',
     refreshed: false,
     get: [Function],
     post: [Function],
     patch: [Function],
    put: [Function],
    del: [Function],
    me: [Function],
     getCredentials: [Function],
    wasRefreshed: [Function] }