How do I change the property of a local player's health?

So say there was a door. The door was like VIP. He didn't have the pass and he would die. How do I do that?

texture = "Texture of the Tshirt"
local Door = script.Parent
function onTouched(hit) 
	print("Door Hit") 
	local human = hit.Parent:findFirstChild("Humanoid") 
	if (human ~= nil ) then 
		if human.Parent.Torso.roblox.Texture == texture then
			Door.Transparency = 0.7 
			Door.CanCollide = false 
			wait(However Many Secs you want to stay open) 
			Door.CanCollide = true 
			Door.Transparency = 0 
		else 
                        human.Health = 0
		end 
	end 
end 

script.Parent.Touched:connect(onTouched)

There, put this under the door.

Why don't just do this?:

local shirt = "id of your shirt"
local player = game.Players.LocalPlayer
local door = script.Parent
function onTouch(part)
	if player.Character.Humanoid.Torso.Texture == shirt then
		door.Transparency = 0.7
		door.CanCollide = false
		wait(2) -- Wait 2 seconds before blocking again the door
		door.Transparency = 0
		door.CanCollide = true
	else
		player.Character.Humanoid.Health = 0
	end
end

door.Touched:connect(onTouch)

You wouldn't want a LocalScript for this and neither of those use GamePasses. I would do something like this-

local GamePassId = 0 -- Put your GamePassId here
local Lethal = true -- Set to false if you don't want it to kill
local OpenTime = 3 -- Time the door stays open in seconds
local GPS = Game:GetService("GamePassService")
local Players = Game:GetService("Players")
local Door = script.Parent

Door.Touched:connect(function(part)
	local plr = Players:GetPlayerFromCharacter(part.Parent)
	if plr then
		if GPS:PlayerHasPass(plr,  GamePassId) then
			Door.CanCollide = false
			Door.Transparency = .5
			wait(OpenTime)
			Door.Transparency = 0
			Door.CanCollide = true
		else
			if Lethal then
				plr.Character:BreakJoints()
			end
		end
	end
end)