Mongoose does not establish the connection with the database on Namecheap shared hosting node js application – CPanel

The flowing code successfully connects mongoose with the mlab database on localhost and Heroku. But it’s not working on Namecheap node js Server.

 const express = require("express");

const mongoose = require("mongoose");
const port = parseInt(process.env.PORT, 10) || 3000;

const server = express();

mongoose.connect("mongodb://@ds213645.mlab.com:13645/techblog", {
  useNewUrlParser: true,
  auth: {
    user: "user",
    password: "pass"
  }
});

const Schema = mongoose.Schema;

const userSchema = new Schema(
  {
    name: String,
    email: String
  },
  { timestamps: true }
);

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

server.get("/test", async (req, res) => {
  const user = new User({ name: "SomeName", email: "[email protected]" });

  const userData = await user.save();

  res.send(userData);
});

server.get("/", async (req, res) => {
  res.send("working");
});

server.listen(port, err => {
  if (err) throw err;
  console.log(`> Ready on ${port}`);
});

When I hit the root(‘/’) route it works perfectly on Namecheap server but when I hit test(‘test’) route it response ‘Incomplete response received from application’ after a long time. So what is the way to connect mongoose with the database on Namecheap shared hosting?