Typeerror: app.use() requires a middleware Function

Question

Index

const express = require("express");
    const bodyParser = require("body-parser");
    const router = require("./config/routes");

    const app = express();

    app.use(bodyParser.json());
    app.use(bodyParser.urlencoded({ extended: true }));

    app.use(router);

    app.use(4000);

controller

 const { Time } = require("../models/index");

module.exports = {
  async create(req, res) {
    const time = await Time.create(req.body);
    return res.json(time);
  }
};

model

    "use strict";

module.exports = (sequelize, DataTypes) => {
  const Time = sequelize.define(
    "Time",
    {
      name: DataTypes.STRING
    },
    {}
  );
  return Time;
};

Good evening guys, I’m with this error Typeerror: app.use() requires a middleware Function, as always but it seemed that, someone can help me, grateful.