It appears you’re working with a rather outdated trello module. I’d recommend using this one as it’s pretty nifty and up-to-date. It’s also easier to work with.
Here’s an example I use in one of my games
local Trello = require(script.Trello.Main)
local MainBoard = Trello:GetBoardByName("Sith Empire")
local SupportersList = MainBoard:GetListByName('Early Supporters')
game:GetService('Players').PlayerAdded:Connect(function(Player)
local Fcard = SupportersList:GetCardByName(tostring(Player.Name))
if not Fcard then
local NewCard = Trello.new("Card", tostring(Player.Name), SupportersList)
Player:Kick('[SUCCESS] You have been successfully verified as a early supporter of the Empire!')
else
Player:Kick('[ERROR] You have already been successfully verified as a early supporter of the Empire!')
end
end)
Hope this helps!