How would I find the local player in a server script?

I am making a script, that every time the npc dies, the player gets +10 coins to their leader stats named "coins". I use the player added function but it only adds plus 10 once. then when the npc health value reaches 0 again, it doesn't add +10. Please help!

local health = script.Parent --script is in a health value of my npc

health.Changed:Connect(function() if health.Value <= 0 then local currentposition = script.Parent.Parent.HumanoidRootPart.CFrame health.Value = 10 script.Parent.Parent.HumanoidRootPart.CFrame = turtlerespawn.CFrame

	--Utter confusion--

	game.Players.PlayerAdded:Connect(function(plr)
		local player = plr
		print(player.Name)
		print("Plus 10")
		player.leaderstats.Coins.Value = plr.leaderstats.Coins.Value + 10
	end)
	wait(5)
	script.Parent.Parent.HumanoidRootPart.CFrame = currentposition
end

	----------------------------------------------------------------------------------------

end)