(About SavedVariable) What would be the problem with this code?

[Layback_]

Hi fellow forum users,

I was trying to create simple resource tracker addon using 'SavedVariables' and here's what I have done so far.

local ResourceTrackFrame = CreateFrame("Frame");
ResourceTrackFrame:RegisterEvent("PLAYER_LOGOUT");

local function ResourceTrackFrame_OnEvent(event, arg1)
	if event == "PLAYER_LOGOUT" then

		realm = GetRealmName();
		name = UnitName("player");
		_, englishClass = UnitClass("player");
		_, currentAmount = GetCurrencyInfo(824);
		
		if type(Resource) ~= "table" then
			Resource = {};
		end

		if type(Resource[realm]) ~= "table" then
			Resource[realm] = {};
		end

		if type(Resource[realm][name]) ~= "table" then
			Resource[realm][name] = {};
		end

		Resource[realm][name]["Class"] = englishClass;
		Resource[realm][name]["GarrisonResource"] = currentAmount;
	end
end

ResourceTrackFrame:SetScript("OnEvent", ResourceTrackFrame_OnEvent);

The current problem is that the value that is being saved are always nil which I honestly don't get why.

According to wikia, it says that "Variables are saved and loaded in the global environment". Would that be something related to this since I declared frame and function as local?