So in my app I can connect to mongodb

const mongoose = require('mongoose');
const dotenv = require('dotenv');
const app = require('./app');

dotenv.config({ path: './config.env' });

const DB = process.env.DATABASE.replace(
  '<PASSWORD>',
  process.env.DATABASE_PASSWORD
);

mongoose
  // .connect(process.env.DATABASE_LOCAL, {
  .connect(DB, {
    useNewUrlParser: true,
    useCreateIndex: true,
    useFindAndModify: false,
    useUnifiedTopology: true,
  })
  .then(() => {
    console.log('DB connection successful!');
  });

const tourSchema = new mongoose.Schema({
  name: {
    type: String,
    required: [true, 'A tour must have a name'],
    unique: true,
  },
  rating: {
    type: Number,
    default: 4.5,
  },
  price: {
    type: Number,
    required: [true, 'A tour must have a price'],
  },
});

const Tour = mongoose.model('Tour', tourSchema);

const testTour = new Tour({
  name: 'Meteora tour',
  rating: 4.9,
  price: 189,
});

testTour
  .save()
  .then((doc) => {
    console.log(doc);
  })
  .catch((err) => {
    console.log('Error');
  });

const port = process.env.PORT || 3000;
app.listen(port, () => {
  console.log(`App running on port ${port}...`);
});

And as you see in the logcat the connection is successful and and a test object is stored.

App running on port 8000...
DB connection successful!
{
  rating: 4.9,
  _id: 61a67242927cc71a57b2a49f,
  name: 'Meteora tour',
  price: 189,
  __v: 0
}

Here is my env file.

NODE_ENV=development
PORT=8000
USERNAME=Theo
DATABASE=mongodb+srv://Theo:<PASSWORD>@cluster0.5k97r.mongodb.net/natours?retryWrites=true&w=majority
DATABASE_LOCAL=mongodb://localhost:27107/natours
DATABASE_PASSWORD=...

Now I want to try something different. I want to run mongodb from the terminal. So I type

mongo "mongodb+srv://cluster0.5k97r.mongodb.net/natours" --username Theo

but I am getting this back

connecting to: mongodb://cluster0-shard-00-00.5k97r.mongodb.net:27017,cluster0-  shard-00-01.5k97r.mongodb.net:27017,cluster0-shard-00-02.5k97r.mongodb.net:27017/natours?authSource=admin&compressors=disabled&gssapiServiceName=mongodb&replicaSet=atlas-axen7p-shard-0&ssl=true


*** It looks like this is a MongoDB Atlas cluster. Please ensure that your IP whitelist allows connections from your network.

Error: can't connect to new replica set master [cluster0-shard-00-02.5k97r.mongodb.net:27017], err: AuthenticationFailed: bad auth : Authentication failed. :
connect@src/mongo/shell/mongo.js:362:17
@(connect):2:6
exception: connect failed
exiting with code 1

How is this possible? In my app I have no problem connecting in MongoDB Atlas. I have whitelisted my IP address.

Thanks, Theo.