How can I use trello to create a banlist/whitelist?

Hi, I've seen multiple games such as Hilton Hotels use trello to have permanent bans of trollers or exploiters, and I was wondering on how I could use trello in my game to remember which players are banned if they rejoin and also to have a list of users on trello that can have admin when they join if they're on the whitelist. I'm not sure how to go about starting.

If you use https://terabyte.services/ They have a Advanced website all free Just create a Appulcation centre download it to a game and modify it on the Website and when soemone sends a appulcation in you can decline it or acept it and also Kick/Ban Spammers