Is there an open alternative to GuiService:AddKey(key)?

Hello, I am trying to import the (around) mid-2014 backpack, but it seems like AddKey and RemoveKey are locked to CoreScripts. Is there an alternative to these functions?

The error is: The current identity (2) cannot AddKey (lacking permission 5)

function registerNumberKeys()
	for i = 0, 9 do
		game:GetService("GuiService"):AddKey(tostring(i))
	end
end

function unregisterNumberKeys()
	for i = 0, 9 do
		game:GetService("GuiService"):RemoveKey(tostring(i))
	end
end

Any help would be greatly appreciated. Thanks!

yes, it’s been 3 years since this post- but for people looking for an answer, its this:
just turn it into a comment or delete it, that simple