Const SESSION_SECRET in node.js

Thanks 3ventic.

I didn’t have the package.json in the directory
I have the index.js running now,

Terminal window shows:

iMac-Home:myapp1 franceswarburton$ node index.js
Twitch auth sample listening on port 3000!

However when I use this in the browser

http://localhost:3000/auth/twitch/callback
I get the following error:

https://localhost/?error=redirect_mismatch&error_description=Parameter+redirect_uri+does+not+match+registered+URI&state=1xLTBSY9QYH5rC8B0UIDRw5n