LocalPlayer Issues in ServerScript?

Hello! So I have a script that runs when a GUI is clicked however, it works in studio but ingame, I looked at the dev console and it says that there is an error on line 8 with LocalPlayer. What am I doing wrong? Also, I now realize that this will only work in a local script so what can I use to replace game.Players.LocalPlayer?

local Button = script.Parent
Frame = script.Parent.Parent.Parent
EditBlock = script.Parent.Parent.Parent.Parent
OldOven = script.Parent.Parent.Parent.Parent.OldOven
NewOven = script.Parent.Parent.Parent.Parent.Oven

function onClick()
if game.Players.LocalPlayer.leaderstats.Money.Value >= 250 then 
Frame.Enabled = false
EditBlock.Transparency = 1
    local user = game.Players:GetPlayerFromCharacter(game.Players.LocalPlayer.Character) --get player from touching human
    local stats = user:findFirstChild("leaderstats") --Find moneyholder
            local cash = stats:findFirstChild("Money") --Get money
            cash.Value  = cash.Value -250
            OldOven:Destroy()
            NewOven.PartOne.Transparency = 0
            NewOven.PartTwo.Transparency = 0
else
    print("Not enough money!")
end

end


Button.MouseButton1Click:connect(onClick)