passport-github how to extract session cookie to know that the user already logged in

I am building a passport-github auth to my application. but I think currently I don't know how to extract the cookie from request that would say user is already logged in. so everytime When i go to home page i get redirected to /login.

My code roughly looks like this:

passport.use(new GitHubStrategy({
    clientID: authConfig.GITHUB_CLIENT_ID,
    clientSecret: authConfig.GITHUB_CLIENT_SECRET,
    callbackURL: "http://127.0.0.1:8080/auth/github/callback"
  },
  function(accessToken, refreshToken, profile, done) {
    // asynchronous verification, for effect...
    return db.user.findOne({where:{github_id:profile.id}})
    .then(data=>{
      if (data) {
        return done(null,data);
      } else {
        return db.user.build({ github_id: profile.id }).save()
        .then(()=>{
          return db.user.findOne({where:{github_id:profile.id}})
        })
        .then(data=>{
          return done(null,data);
        })
      }
    });
  }
));

// Passport session setup.
//   To support persistent login sessions, Passport needs to be able to
//   serialize users into and deserialize users out of the session.  Typically,
//   this will be as simple as storing the user ID when serializing, and finding
//   the user by ID when deserializing
passport.serializeUser(function(user, done) {
  console.log("serialize>>>>>", user.github_id);
  done(null, user.github_id);
});

passport.deserializeUser(function(id, done) {
  console.log("deserialize>>>>", id);
  db.user.findOne({where:{github_id: id}})
  .then(user=>{
    done(null, user.toJSON());
  })
});

I have established the session :

app.use(session({ secret: 'keyboard cat', resave: false, saveUninitialized: false }));
app.use(passport.initialize());
app.use(passport.session());

And I have an isAuthenticated function that checks for req info:

function isAuthenticated (req, res, next) {
  // If the user is logged in, continue with the request to the restricted route
  console.log("req.user is>>>>", req);
  if (req.isAuthenticated()) {
    return next();
  }
  // If the user isnt' logged in, redirect them to the login page
  return res.redirect("/login");
}

I am using this passport-github lib. I cannot get some useful information from reqseems

via WABBIT0111