How would I make it so only a certain rank and up can go through?

here is my script How would I make it so only a certain rank and up can go through?

local groups = {3309505}
local kills = true 
function isInGroups(player)
	for _,v in pairs(groups) do
		if player:IsInGroup(v) then
			return true
		end
	end
	return false
end

local enabled = true

script.Parent.Touched:connect(function(hit)
	if not enabled then return end
	if not hit.Parent then return end
	enabled = false
	local player = game.Players:GetPlayerFromCharacter(hit.Parent)
	if player then
		if isInGroups(player) then
			script.Parent.CanCollide = false
			wait(3)
			script.Parent.CanCollide = true
		else
			if hit.Parent:FindFirstChild("Humanoid") then
				hit.Parent.Humanoid.Health = 0
			end
		end
	end
	enabled = true
end)