try to speak mangoose

backend/routes/routesToucan.js

@@ -158,6 +158,7 @@ router.route("/img/:id")
         try {  
               urltoucans.
               match({urlId: 'boule-2022'}).
+              getfield("urlId").
               exec((err,data) => {
                 if (err) {
                   console.log(err);