Information about this tool
Your Spotify authentication information isn't saved anywhere permanently (unless you want it to in a cookie), just in your session, so once your session ends with the site, you'll have to click on the authenticate button again to use the tool.
If you've approved access to this application previously before, it should redirect you back here as you don't need to reapprove this application again.
If it throws an error, it could possibly be caused by too many requests being sent to Spotify.
If you want to revoke access for this tool, go to your Approved Applications
in your Spotify profile.
Look for Playlist Tools by Steven Aleong
and click on the Revoke Access button beside it.
If you want to reuse the tool after that, you just need to grant this tool permissions again by clicking on the authenticate button above.
For playlists that have been randomized or reversed or funneled, I save the following information:
User name, playlist name, playlist id, and the number of tracks in the playlist.
This data is pulled using the Spotify API Endpoint:
Get a User's Profile
and Get a List of a User's Playlists