My twitter code datastore isn't working whats wrong with the script?

function DataHandler(p,o,key)	-- DataHandler(Player, Object [, Key])
	local types = {
		IntValue = "Number";
		NumberValue = "Number";
		ObjectValue = "Instance";
		BoolValue = "Boolean";
		StringValue= "String";
	}
	local t = types[o.ClassName]
	if (not t) then return end
	key = (type(key) == "string" and key or o.Name)	-- If it's a string, keep it the same, ELSE change it to the object's name. Allows 'key' to be an optional argument.
	key = (#key > 0 and key or key.Name == o.Name and o.ClassName or o.Name)	-- If length of string is greater than 0, keep it the same
	if (not p.DataReady) then														-- ELSE if it is equal to the object's name then that means that the
		p:WaitForDataReady()														-- object's name is blank, therefore make 'key' the ClassName.
	end																			-- ELSE make it the name of the object.
	local Save,Load = p[("Save%s"):format(t)],p[("Load%s"):format(t)]	-- Steal the load and save functions from the player
	o.Value = Load(p,key)	-- The same as p:LoadTYPE(key). Since it's no longer a method, the player must be the first argument
	local lastV = o.Value
	o.Changed:connect(function(v)
		lastV = v
		delay(1,function()						-- Give a 1 second buffer to see if the value changes anymore. If so, stop the operation. If it goes 1 second without changing, it will automatically save.
			if (lastV ~= v) then return end	-- This way you don't save a value 20 times in 1 second if it changes constantly. Lower data processing = less lag
			Save(p,key,v)
		end)
	end)
end

game.Players.PlayerAdded:connect(function(player)
	repeat wait() until player:WaitForChild("PlayerGui")
	
	local testingRedeemed = Instance.new("BoolValue")
	testingRedeemed.Value = false
	testingRedeemed.Name = "testing"
	testingRedeemed.Parent = player.PlayerGui["Twitter code"].Redeemed
	
	local FiveKRedeemed = Instance.new("BoolValue")
	FiveKRedeemed.Value = false
	FiveKRedeemed.Name = "5k"
	FiveKRedeemed.Parent = player.PlayerGui["Twitter code"].Redeemed
	
	local OfcPedrooRedeemed = Instance.new("BoolValue")
	OfcPedrooRedeemed.Value = false
	OfcPedrooRedeemed.Name = "OfcPedroo"
	OfcPedrooRedeemed.Parent = player.PlayerGui["Twitter code"].Redeemed
	
	DataHandler(player,testingRedeemed,"testing")
	DataHandler(player,FiveKRedeemed,"5k")
	DataHandler(player,OfcPedrooRedeemed,"5k")
end)