bugfix(social auth): redirect to frontend on successful signin

if a user has successfully signed in, generate a token and redirect the user to the front end

[Finishes #165380523]

routes/v1.js

@@ -1,4 +1,5 @@
 import express from 'express';
+import jwt from 'jsonwebtoken';
 import UserController from '../controllers/user';
 import passport from '../auth/passport';
 import ProfileController from '../controllers/profile';
@@ -121,7 +122,14 @@ apiRoutes.get('/auth/google/callback',
     'google', { failureRedirect: '/login' }
   ),
   (req, res) => {
-    res.redirect('/');
+    const { user } = req;
+    user.password = undefined;
+    user.verified = undefined;
+    user.verificationId = undefined;
+    user.passwordResetToken = undefined;
+    user.passwordResetTokenExpires = undefined;
+    const token = jwt.sign({ ...req.user }, process.env.JWT_SECRET);
+    res.redirect(`${process.env.HOST_URL_FRONTEND}/social/callback?token=${token}`);
   });
 
 apiRoutes.get('/auth/facebook',
@@ -136,7 +144,14 @@ apiRoutes.get('/auth/facebook/callback',
     'facebook', { failureRedirect: '/login' }
   ),
   (req, res) => {
-    res.redirect('/');
+    const { user } = req;
+    user.password = undefined;
+    user.verified = undefined;
+    user.verificationId = undefined;
+    user.passwordResetToken = undefined;
+    user.passwordResetTokenExpires = undefined;
+    const token = jwt.sign({ ...req.user }, process.env.JWT_SECRET);
+    res.redirect(`${process.env.HOST_URL_FRONTEND}/social/callback?token=${token}`);
   });
 
 apiRoutes.post(