why doesnt my values save with datastore? Instead does nothing with no errors?

I have a script that is suppose to save the UserId of the player but when I try every time it doesn't work. The kick part works as it kicks the player but if they join another server it does nothing. Can someone tell me how to fix it. Im fairly new to datastores and I don't really get it.

 local ds = game:GetService("DataStoreService")

local bansave = ds:GetDataStore("Bansaves")









local id = {50816673}

function checkplayer(player)

player.Chatted:connect(function(msg)

if string.lower(string.sub(msg,1,4)) == "!ban"

then

local User = game.Players:FindFirstChild(string.sub(msg,6)).UserId

table.insert(id,#id + 1,User)

for i,v in pairs(id) do

local name = v

if player.UserId == name then

player:kick("[Reason]You have been caught exploiting. [Ban Time]: Forever. You may appeal if you like")

bansave:SetAsync("id", id)

end

end

end

end)





while true do

wait()

for value in ipairs(id) do

local name = value

if player.UserId == name

then player:kick("[Reason]You have been caught exploiting. [Ban Time]: Forever. You may appeal if you like")

end

end

end

end

game.Players.PlayerAdded:Connect(checkplayer)