Wait time for player?

Hello,

How can I make "Wait" for one player? example, "Bob" touches the button and then he gets 21 Coins, but if "Peter" touches it, he can't get points because of wait(600). How can I make "Bob" example has to wait 600 Seconds before HE can touch it again to gain coins.

Name's were just examples

--Basically checks if the toucher of the button is a player, then adds money to that player.

--Uberubert
--This script is free to use for anyone

local ting = 0 --debouncer

function onTouched(hit)

	if ting == 0 then --debounce check
	ting = 1 --activate debounce
	check = hit.Parent:FindFirstChild("Humanoid") --Find the human that touched the button

	if check ~= nil then --If a human is found, then

		local user = game.Players:GetPlayerFromCharacter(hit.Parent) --get player from touching human
		local stats = user:findFirstChild("leaderstats") --Find moneyholder

		if stats ~= nil then --If moneyholder exists then
			local timers={}
        	local a,b=timers[player.Name]or 0,tick()
        	if b-a>=600 then
            timers[user.Name]=b
            local cash = stats:findFirstChild("Points") --Get money
			cash.Value  = cash.Value +300 --increase amount of money by the number displayed here (500)
	ting = 0 --remove debounce

script.Parent.Touched:connect(onTouched)
end
		end
	end
	end
end