const mongoose = require('mongoose');

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

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

const User = mongoose.model('User', userSchema);

const user = new User({ name: 'علی', age: 25 });
user.save().then(() => console.log('کاربر ذخیره شد'));