Money Door | How do I make it local player and it stays forever?

How do I make this script local player so that others cant go through when someone buys it and that the purchase stays forever? Here is the script : What do I add or delete

local required_points = 2000

local db = true
script.Parent.Touched:Connect(function(hit)
    if hit.Parent:FindFirstChild("Humanoid") then
        local player = game.Players:GetPlayerFromCharacter(hit.Parent)
        if player.leaderstats.Coins.Value >= required_points then
            if db then
                db = false
                script.Parent.Transparency = 0.5
                script.Parent.CanCollide = false
                wait (3)
                script.Parent.CanCollide = true
                script.Parent.Transparency = 0
                db = true
                script.Parent.CanCollide = true
                player.leaderstats.Coins.Value = player.leaderstats.Coins.Value - 2000
            end
        else
            player.Character.Humanoid.Health = 0
        end
    end
end)