Passport Facebook - can't get my head around sending a token

Question

UPDATED: current solution below.

I am adding facebook login to my site - that I was hoping to be simple but difficult.

(built with Node.js / Express API and Angular)

So, my questions I ask to help with:

1 - Instead of successRedirect returns a token

I use passport-facebookto help with the login process, but in the callback, instead of successRedirect, I can simply say that it returns json containing the token. Note that the token is a JWT that I already use with standard email authentication, and am currently creating it in passport.serializeUser:

passport.serializeUser(function(user, done) {
  var token = ///implementation for token
  done(null, user);
});

And then in the callback do something like:

router.get('/login/facebook/callback',
  passport.authenticate('facebook', {
     res.json({success: true, token:token)
  })
);  

2 - How to handle the client side

, , - , "" $http.get. URL-, , "login with facebook", router.get('/login/facebook', facebook, , , , , .

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---

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1 - API-. URL-, JWT:

router.get('/login/facebook/callback',
  passport.authenticate('facebook',
          { session: false, failureRedirect: "/processfblogin/false"  }),
  function(req, res) {
    res.redirect("/api/processfblogin/" + req.user._id);
  }
);

URL.

, . $http, CORs 302. URL :

res.redirect('http://localhost:3000/#/fbToProcess/' + token);

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json, , : -)