What do I do? - 16:52:59.829 - IsInGroup is not a valid member of Players?

So, Still making a script for my friend. Now, My script isn't working at all! :( No output errors.

It is a normal script located in Workspace > TouchPart

UPDATED :

game.Workspace.TouchPart.Touched:Connect(function(hit)

-- I will ignore your other code for now
 local part = script.Parent
 local debounce = false

if hit.Parent:FindFirstChild("Humanoid") then -- will tell you if what hit it is a player
local players = game:GetService("Players")
local plar = players:GetPlayerFromCharacter(hit.Parent) -- getting the player from the players service by providing the character.

 if plar:IsInGroup(3467972) then
	   if not debounce then
	debounce = true
 
	wait(1) 
	 part.BrickColor = BrickColor.Green()
else
	part.BrickColor = BrickColor.Red()
end
debounce = false
	end
	end
end)

Ok so here we go:

game.Workspace.TouchPart.Touched:Connect(function(hit)
-- I will ignore your other code for now

	if hit.Parent:FindFirstChild("Humanoid") -- will tell you if what hit it is a player
		local players = game:GetService("Players")
		local plar = players:GetPlayerFromCharacter(hit.Parent) -- getting the player from the players service by providing the character.
		if if plar:IsInGroup(3467972) then

I hope this helps and have a great day scripting!