my tool saving script is not working. why?

Im trying to make a script that can save the tools that players gained during their journey i made this so far but is not working

local key = "keyg3n"

local players = game:GetService("Players")

game.Players.PlayerAdded:connect(function(loady)

local player = players:GetPlayerFromCharacter(loady)

local backpack = player.BackPack

loady:WaitForDataReady()

tools = loady:loadInstance(key..player.Name)

tools.Parent = backpack

end)

game.Players.PlayerRemoving:connect(function(savy)

local player = players:GetPlayerFromCharacter(savy)

local backpack = player.BackPack

local inventory = backpack:GetChildren()

savy:WaitForDataReady()

if inventory then

    savy:saveInstance(key..player.Name)

end

end)

what is wrong on my script?

it is supposed to keep the tools that players gained whem they leave or die

NOTE: its my first time asking a question so im sorry for any mistake above