Usernames will be added to the list via a cloud variable and encoding and decoding script. Once your username is added only a few letters of it or other usernames may appear due to a bug; click the green flag again to see your username appear.
Thanks to @griffpatch for the encoding and decoding script. All other code is by me. Note: If you are not logged in or you're a New Scratcher you can't be added to the list, sorry! IMPORTANT NOTE: NO LONGER WORKS?? MAYBE ENCODED CLOUD VARIABLE CRASHED?