send me the code of mongoose in expressjs

codeSharing-aa513732df60.js

const express = require('express');
const mongoose = require('mongoose');
const app = express();
app.use(express.json());

mongoose.connect('mongodb://localhost:27017/mydatabase', {
  useNewUrlParser: true,
  useUnifiedTopology: true
});

const db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', () => {
  console.log('Connected to MongoDB');
});

const mySchema = new mongoose.Schema({
  name: String,
  age: Number
});

const MyModel = mongoose.model('MyModel', mySchema);

app.post('/mymodel', async (req, res) => {
  try {
    const newModel = new MyModel(req.body);
    const savedModel = await newModel.save();
    res.status(201).json(savedModel);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

app.get('/mymodel', async (req, res) => {
  try {
    const models = await MyModel.find({});
    res.json(models);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

app.listen(3000, () => {
  console.log('Server listening on port 3000');
});