stop logging whole session (diagnostic)

app/controllers/auth.js

@@ -140,7 +140,7 @@ class AuthController extends SiteController {
 
   async postLogin (req, res, next) {
     const redirectUri = req.session.loginReturnTo || '/';
-    this.log.debug('starting passport.authenticate', { session: req.session, redirectUri });
+    this.log.debug('starting passport.authenticate', { redirectUri });
     passport.authenticate('dtp-local', (error, user/*, info*/) => {
       if (error) {
         req.session.loginResult = error.toString();