How can I properly use pcall to store and get data from a datastore?

Thanks for the big help on my last problem. Unfortunately, I ran my code and it just.... didn't work in the slightest... I have activated the studio api. Can someone please see what's wrong?

local DataStoreService = game:GetService("DataStoreService")
local currencyStore = DataStoreService:GetDataStore("PlayerCurrency")

local player = script.Parent.PlayerName.Value
local currency = script.Parent.Currency.Value
local value = script.Parent.Currency
local button = script.Parent.Parent.OnButton.ClickDetector
local first = script.Parent.First.Value

value.Changed:Connect(function() -- Enclosing function 
    local saved, err = pcall(function()
        currencyStore:SetAsync(player, currency, first)
    end)
    if not saved then warn(err) end
end)

button.MouseClick:Connect(function(player)
	local loaded, err = pcall(function(player)
		return currencyStore:GetAsync(player, currency, first)
	end)
	if loaded then
		script.Parent.Currency.Value = currency
		script.Parent.First.Value = first
		print("data loaded")
		script.Parent.PlayerName.Value = player
	end
end)

It didn't output any error, but even after having written currencyStore:SetAsync("20002000sa", 2000, false) on the 3rd line, it didn't change anything.