Ошибка при создании CREATE TABLE (mysql) в Node JS (express)

**Всем привет наткнулся на проблему и нужен совет для решения данной проблемы.**
------------------------------------------------------------------------

*В конце вылетает не хорошая ошибка. Код не сложный буду рад любой помощи*

    Error: Route.post() requires a callback function but got a [object Object]
    at Route.<computed> [as post] (D:\dev\project_1\node_modules\express\lib\router\route.js:202:15)
    at Function.app.<computed> [as post] (D:\dev\project_1\node_modules\express\lib\application.js:482:19)
    at Object.<anonymous> (D:\dev\project_1\server.js:12:5)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
    at Module.load (internal/modules/cjs/loader.js:928:32)
    at Function.Module._load (internal/modules/cjs/loader.js:769:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12)
    at internal/main/run_main_module.js:17:47
[nodemon] app crashed - waiting for file changes before starting...




//Создаю сервер
"use strict";
const express = require("express");
const connection = require("./config/db.connect.js");
const createTable = require ('./models/Users.js')

const app = express();
global.app = app;

const PORT = 5000;
app.use(express.json());


app.post("/createtable", createTable);

const startApp = () => {
  try {
    app.listen(PORT, () => {
      console.log(`Server started on port ${PORT}`);
    });
  } catch (error) {
    console.log(error);
  }
};

startApp();


//Подключаюсь к БД (MySQL)
"use strict";
const mysql = require('mysql')


const connection = mysql.createConnection({
  host: "sqlserver.local",
  user: "root",
  database: "node_users",
  password: "password",
});

connection.connect((err) => {
  if (err) {
    return console.error("Ошибка: " + err.messsage);
  } else {
    console.log("Connected to MySQL");
  }
});

connection.end((err) => {
  if (err) {
    return console.log("Ошибка выхода: " + err.message);
  } else {
    console.log("Подключение закрыто");
  }
});

global.connection = connection
module.exports = connection

//Пытаюсь создать таблицу

"use strict";
exports.createTable = ('/createtable', (req, res) => {
  let  sql = "INSERT INTO users (id int AUTO_INCREMENT, fullname VARCHAR (255), address VARCHAR (255), PRIMARY KEY(id) )"
  db.query = (sql, (err, result) => {
      if(err){
          throw err
      }
      else {
          console.log('USERS created')
        }

  })
});