try to speak mangoose

backend/routes/routesToucan.js

@@ -157,6 +157,7 @@ router.route("/img/:id")
     router.get('/pdf/url', (req, res) => {
         try {  
               console.log(req.params.url);
+              console.log(urltoucans.path('urlId'));
               urltoucans.
               match({_id: mongoose.Types.ObjectId('5fc9e888f47f0041d8b83719')}).
               exec((err,data) => {