add optional chaining to get query

Author: khalatevarun

controllers/users.js

@@ -67,7 +67,7 @@ const getUserById = async (req, res) => {
 
 const getUsers = async (req, res) => {
   try {
-    const query = req.query.query;
+    const query = req.query?.query ?? "";
     const qualifiers = getQualifiers(query);
 
     if (qualifiers?.filterBy) {