InternalOAuthError is not part of passport, but of passport-oauth2

This fixes part of #1056: an error while obtaining the profile
would have `502`-crashed the server.

Signed-off-by: Claudius Coenen <opensource@amenthes.de>

Author: ccoenen

lib/web/auth/oauth2/index.js

@@ -2,13 +2,13 @@
 
 const Router = require('express').Router
 const passport = require('passport')
-const OAuth2Strategy = require('passport-oauth2').Strategy
+const { Strategy, InternalOAuthError } = require('passport-oauth2')
 const config = require('../../../config')
 const {setReturnToFromReferer, passportGeneralCallback} = require('../utils')
 
 let oauth2Auth = module.exports = Router()
 
-class OAuth2CustomStrategy extends OAuth2Strategy {
+class OAuth2CustomStrategy extends Strategy {
   constructor (options, verify) {
     options.customHeaders = options.customHeaders || {}
     super(options, verify)
@@ -22,7 +22,7 @@ class OAuth2CustomStrategy extends OAuth2Strategy {
       var json
 
       if (err) {
-        return done(new passport.InternalOAuthError('Failed to fetch user profile', err))
+        return done(new InternalOAuthError('Failed to fetch user profile', err))
       }
 
       try {
@@ -67,7 +67,7 @@ OAuth2CustomStrategy.prototype.userProfile = function (accessToken, done) {
     var json
 
     if (err) {
-      return done(new passport.InternalOAuthError('Failed to fetch user profile', err))
+      return done(new InternalOAuthError('Failed to fetch user profile', err))
     }
 
     try {