I am unable to pass requests with postman, and the error message is the one being printed on console. Before applying then method I was able to see the connection successful mssage but still wasn't able to get/post via postman

//database connection
mongoose.connect(
  process.env.MONGO_URL,
  { useNewUrlParser: true, useUnifiedTopology: true }).then(()=>{
    console.log("connection successful")
  }).catch((error)=>{
    console.log("Error occured on connection")
  });

Requiring the connection via

const mongoose = require("mongoose");

and the MONGO_URL mentioned in .env file is

MONGO_URL = mongodb+srv://username:password@cluster0.8noo9.mongodb.net/dbname?retryWrites=true&w=majority

been stuck here for a while. I am setting up mongoose for the first time