I'm trying to follow a tutorial and it says:
"There are a few ways to load credentials.
Environment variables (in this case) are being used to pass credentials to your application.
USER_KEY can both be accessed from
process.env.USER_KEY respectively. You don't need to edit them, just access their contents.
It looks like they are simply giving you the choice between loading your
USER_KEY from either
process.env or some specificed file on disk.
Now, the magic happens when you run the application.
USER_ID=239482 USER_KEY=foobar node app.js
That will pass the user id
239482 and the user key as
foobar. This is suitable for testing, however for production, you will probably be configuring some bash scripts to export variables.