'access_token' not present in the passport-github2 request

I have registered an OAuth App via my Github account. I am basically trying to authorize my node requests(by sending `access_token` as part of request cookies) so I can access few APIs on another server. Hence I am using the `github-passport2` package. I have setup the github strategy etc. & it seems to be all according to the doc. The flow works well too.

### My Issue
After logging into Github(authorized) & getting redirected back to my `/auth/github/callback`, I ideally should be authorized and should have an `access_token` in the `req`. But I don't have it! Because of this I am not able to authorize my future requests with an `access_token`.

Important to note is that, this `access_token` is automatically attached when the request is initiated from a browser/client(using `withCredentials: true` parameter). The same `access_token` via node doesn't seem to be retrievable.

```
passport.use(new GitHubStrategy({
clientID: GITHUB_CLIENT_ID,
clientSecret: GITHUB_CLIENT_SECRET,
callbackURL: "http://localhost:8080/auth/github/callback",
},
function(accessToken, refreshToken, profile, done) {
// asynchronous verification, for effect...
process.nextTick(function () {
return done(null, profile);
});
}
));

app.get('/auth/github', passport.authenticate('github', { scope: [ 'user:email' ] }), function(req, res){
// The request will be redirected to GitHub for authentication, so this
// function will not be called.
});

app.get('/auth/github/callback', passport.authenticate('github', { failureRedirect: '/login' }), function(req, res) {
console.log(req); // <- This ideally should have the access_token? but doesn't
});
```

Any help is much appreciated

Start at the GitHubStrategy setup and the /auth/github/callback handler shown in the issue, then inspect how the verification callback receives and exposes authentication values. Compare that flow with the Passport and strategy documentation; done means the issue clearly identifies where the token is available or what configuration is missing.

Written by the indexing model from the issue text.