fixed runtime errors

plugins/talk-plugin-facebook-auth/server/router.js

@@ -1,26 +1,28 @@
 module.exports = router => {
-  const { passport, HandleAuthPopupCallback } = require('services/passport');
-
   /**
-   * Facebook auth endpoint, this will redirect the user immediatly to facebook
+   * Facebook auth endpoint, this will redirect the user immediately to facebook
    * for authorization.
    */
-  router.get(
-    '/api/v1/auth/facebook',
-    passport.authenticate('facebook', {
+  router.get('/api/v1/auth/facebook', (req, res, next) => {
+    const { connectors: { services: { Passport } } } = req.context;
+
+    return Passport.authenticate('facebook', {
       display: 'popup',
       authType: 'rerequest',
       scope: ['public_profile'],
-    })
-  );
+    })(req, res, next);
+  });
 
   /**
    * Facebook callback endpoint, this will send the user a html page designed to
-   * send back the user credentials upon sucesfull login.
+   * send back the user credentials upon successful login.
    */
   router.get('/api/v1/auth/facebook/callback', (req, res, next) => {
+    const { connectors: { services: { Passport } } } = req.context;
+    const { HandleAuthPopupCallback } = Passport;
+
     // Perform the facebook login flow and pass the data back through the opener.
-    passport.authenticate(
+    Passport.authenticate(
       'facebook',
       { session: false },
       HandleAuthPopupCallback(req, res, next)