Linkedin 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: '{"serviceErrorCode":401,"message":"Empty oauth2 access token","status":401}',
   status: 401,
  message: 'Unauthorized' }

How to reproduce

• Login using linkedin
• Call API endpoint /v2/me

app.get('/api', function (req, res){
    oauth.auth('linkedin', req.session, {
      credentials: req.session.credentials
    }).then(function (request_object) {
            return request_object.get('/v2/me', {
            });
        })
        .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

  { oauth_token: 'xxxxxxxxxxxxxxxxx',
    oauth_token_secret: 'xxxxxxxxxxxxxx',
     request: { url: 'https://api.linkedin.com' },
     state: 'xxxxxxxxxxxxx',
    provider: 'linkedin',
   refreshed: false,
    get: [Function],
   post: [Function],
    patch: [Function],
   put: [Function],
    del: [Function],
   me: [Function],
    getCredentials: [Function],
     wasRefreshed: [Function] }