When passing a user handle, create a list of the people they follow.
Copy config.example.json
to config.json
and fill the values in after creating an app from here.
$ bin/go ericlbarnes
This will start the script and add up to 300 people ericlbarnes follows to a list called ericlbarnes-following
on your profile.
This only gathers the latest 20 followers they have, need to implement curser walking, and even then it still only allows up to 300 users in a 15 minute window. So if someone follows more than that, you'll be out of luck.