Refactor getUserData function to use fs.promises for file reading

Middlewares/UserIDMiddlewareAD.js

@@ -1,9 +1,18 @@
-const fs = require('fs');
+const fs = require('fs').promises;
 const path = require('path');
-const { getUserData } = require('../Middlewares/watcherMiddleware');
 
 const filePath = path.join(__dirname, '../user.json');
 
+async function getUserData() {
+    try {
+        const fileContent = await fs.readFile(filePath, 'utf8');
+        return JSON.parse(fileContent);
+    } catch (err) {
+        console.error(`Failed to read from ${filePath}: ${err}`);
+        throw err;
+    }
+}
+
 async function checkUserExistsAD(req, res, next) {
     let userData = await getUserData();