How to use session variable req.user in passport-twitter strategy

As I can use req.user to get the logged in user in any of route by passing in:

passport.authenticate("jwt", { session: false })

I want to allow the user to sign in with twitter other than local login, so I have a passport-twitter strategy in node.js API. How can I access locally logged in user with req.user?

module.exports = passport => {
  passport.use(
    new Strategy({
        consumerKey: "",
        consumerSecret: "",
        callbackURL: "http://localhost:3000"
      },
      function(token, tokenSecret, profile, cb) {
        Profile.findOne({
          user: req.user._id
        }).then(
          userdetail => {
            userdetail.twuser = profile._json.screen_name;
            userdetail.token = token;
            userdetail.tokenSecret = tokenSecret;

            userdetail.save().then();
            return cb(null, profile);
          }
        )
      }
    )
  );
};

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