get deep copy bug fix

src/user-profile/profile-routes.ts

@@ -33,12 +33,13 @@ userProfileRoutes.get('/deep-copy/', jwtAuthentication, async (request, response
     const wordCollection = getDatabaseClient().db(DB_NAME).collection<Word>('words');
 
     const allDeepCategories: any = [];
+    let allCategories;
 
-    const allCategories = await categoryCollection.find({
-        _id: { $in: user.categories.map(id => new ObjectId(id)) }
-    }).toArray();
-
-    if (allCategories === undefined) {
+    try {
+        allCategories = await categoryCollection.find({
+            _id: { $in: user.categories.map(id => new ObjectId(id)) }
+        }).toArray();
+    } catch {
         response.status(200);
         response.json({
             _id: user._id,