add: added mentions

back/api/searchuser.js

@@ -0,0 +1,14 @@
+const express = require('express');
+const { getConnection, searchUser } = require('../libs/mysql');
+
+const router = express.Router();
+
+router.get('/', async (req, res) => {
+    const { search } = req.query;
+    const connection = await getConnection();
+    const users = await searchUser(connection, search);
+    connection.end();
+    res.send(users);
+});
+
+module.exports = router;