Special Door Help? Player Limit

So lets say I have six players (Player 1 though 6). Now I have 2 doors(Door 1 and 2). How would I make it so that only a certain number of players can pass through the door before it will not let anyone else through. Lets say Door 1 has a player limit of 4 people. How would I make it so that after 4 players go through it, no more players can go through it until one of the original 4 players dies or leaves the server???

Put them all in a table, because there are multiple parts in a humanoid. Or, you can be fancy with shared/_Global variables.

touchedPlayers = {} --global just in case I messed it up; i don't know about syntax because I'm writing this in the actual scriptinghelpers answer box
MAX_PLAYER_COUNT = 4
game.Players.PlayerAdded:connect(function(player)
	player.CharacterAdded:connect(function(character)
		character:WaitForChild('Humanoid').Died:connect(function(death)
			touchedPlayers[player.Name] = nil
		end)
	end)
end)

game.Players.PlayerRemoving:connect(function(player)
    	touchedPlayers[player.Name] = nil
end)
game:GetService('RunService').Heartbeat:connect(function(doublestep)
	if #touchedPlayers == MAX_PLAYER_COUNT then
		v.CanCollide = true
	else
		v.CanCollide = false
	end
end)

script.Parent.Touched:connect(function(hit)
	if #touchedPlayers == MAX_PLAYER_COUNT then
		return nil 
	end

	Humanoid = hit:FindFirstAncestorOfClass('Model')
	
	if Humanoid and not touchedPlayers[Humanoid.Name] then
		if game.Players:FindFirstChild(Humanoid.Name) then
			touchedPlayers[game.Players[Humanoid.Name]] = true
		end
	end

end)

Tell me errors and I'll edit it. Currently can't open roblox studio (and do much on it because of crashing)

Here is an idea:

local maxPlayersThrough = 4
local playersThrough = 0

script.Parent.Touched:Connect(function(hit)
	if hit.Parent:FindFirstChild("Humanoid") then -- detects if they are a player
		if playersThrough < maxPlayersThrough then
			playersThrough = playersThrough + 1
		end
	end
end)
	

mind you this script will only work if the same player does not leave the room or touch the door as well as if a player who went through the door leaves the server. Hope this helps! Have a great day scripting!