NB if you are NOT following the 2019 video tutorial:

• You need to add a .env file to set DATABASE_URL to (e.g.) mongodb://localhost/subscribers.

• For easy testing, install REST Client VS Code plugin and add a "route.rest" file.

Mongoose is now (2024) at version 8, and two minor changes have been made to the code.

At server.js,

mongoose.connect(process.env.DATABASE_URL, { useNewUrlParser: true })

is now

mongoose.connect(process.env.DATABASE_URL)

At routes/subscribers.js

await res.subscriber.remove()

is now

await res.subscriber.deleteOne()

The core concepts in the tutorial are however still applicable as of June 2024.