Does Get Async get the variable?

I used the a local variable in a function and when i want to check if the plr is banned it gives me an error.

Heres my code-

local DataStoreService = game:GetService('DataStoreService')
local PermBanData = DataStoreService:GetDataStore('PermBanData')

game.Players.PlayerAdded:Connect(function(plr)
    for _,v in pairs(PermBanData) do
        if plr.UserId == v then
            local currentReason = PermBanData:GetAsync(permbanReason) -- Where the error is.
        end
    end
end)

game.Players.PlayerAdded:Connect(function(plr)
    for _,v in pairs(Enforcers) do
        if plr.Name == v then
            plr.Chatted:Connect(function(permbanmsg)
                if string.lower(permbanmsg:sub(1, 8)) == ':permban' then
                    local commandSplits = string.split(permbanmsg:sub(10, -1), ' ')
                    local plrPermBanArg = PlayerArgument()(commandSplits[1])
                    local permbanReason = permbanmsg:sub(11 + commandSplits[1]:len(), -1)

                    PermBanData:SetAsync(plr.UserId, permbanReason)
                    plrPermBanArg:Kick('\n You have been kicked for violating Terms of Service. \n Enforcer: '..plr.Name..'\n Notes: '..permbanReason)
            end
        end)
    end
end)