How to have players banned and not just kicked?

ik there is a banned string and all but the banned string for some reason wont ban the players its as if I don't have a string there at all there a fix to this or a line I need to add?

local speakers = {"skillfulzombie88"}
local banned = {""}

local function checkSpeakers(name)
	for _,speaker in pairs(speakers) do
		if name:lower() == speaker:lower() then return true
			 end
	end
	return false
end

local function banPlayer(banner, victim)
	if victim ~= banner then
		victim:Destroy()
		banned[victim.Name] = victim.Name
	end
end
 
local function matchPlayer(str)
	local result = nil
	local players = game.Players:GetPlayers()
	for _, player in pairs(players) do
		if player.Name:lower():find(str) == 1 then
			--Abort if two players match the string
			if result then return end
 
			result = player
		end
	end
	return result
end
 
local function onChatted(msg, speaker)
	-- split command into the first word and the remaining words
	local cmd, args = msg:lower():match("(%w+) (.+)")
 
	if cmd == "ban" then
		-- words and numbers
		for word in args:gmatch("%w+") do 
			local p = matchPlayer(word)
			if p then
				banPlayer(speaker, p)
			end
		end
	end
end
 
local function onPlayerEntered(newPlayer)
	-- remove banned player if they try to come back in
	for _, v in pairs(banned) do
		if v:lower() == newPlayer.Name:lower() then
			newPlayer:Destroy()
		end
	end
	if checkSpeakers(newPlayer.Name) then
		newPlayer.Chatted:connect(function(msg, recipient)
			onChatted(msg, newPlayer)
		end) 
	end
end
 
game.Players.PlayerAdded:connect(onPlayerEntered)

I can shorten this for you very much. The only problem is, this is a Free Model I am guessing you found in studio. If it is, I will need you to atleast try to fix it somewhat, just reply.. I'll reply back and help you ;)

• Expresssion

Put this in a script inside of ServerScriptService. It should work.

local bannedplayers = {"Player name", "Player name 2", "etc"}

game.Players.PlayerAdded:connect(function(player)
for i, v in pairs(bannedplayers) do
if v == player.Name then
player:Kick()
end
end
end)