mongoose get connection object from another cile code example

Example 1: mongoose setup

// getting-started.js
const mongoose = require('mongoose');
mongoose.connect("mongodb://localhost:27017/name", { useUnifiedTopology: true, useNewUrlParser: true });

Example 2: connect to existing collection mongoose

new Schema({ url: String, text: String, id: Number}, 
           { collection : 'question' });   // collection name