How do I make this door script E to open while facing the door?

I've been working at this for a while and haven't come up with a solution. This door script teleport the player to a part and i am trying to make it E to open but only making the GUI pop up while the mouse is facing the door and now i'm back to square one.

I Would really love some help. Thank you in advance

local plr = game.Players.LocalPlayer

local teleports = workspace:WaitForChild("Teleports")
local enterButton = script.Parent.enterButton

local range = 5
local exitPart

enterButton.MouseButton1Click:connect(function()
	
	if exitPart then
		
		local hrp = plr.Character:FindFirstChild("HumanoidRootPart")
		
		if hrp then 
			
			hrp.CFrame = exitPart.CFrame + Vector3.new(0,3,0)
		end
	end
end)

game:GetService("RunService").RenderStepped:connect(function()
	
	for _,door in pairs(teleports:GetChildren()) do
		
		if door.Name:sub(0,4) == "Door" then 
			
			local exit = teleports:FindFirstChild("Exit"..door.Name:sub(5))
			
			local hrp = plr.Character:FindFirstChild("HumanoidRootPart")
			
			if hrp then 
				
				if (door.Position-hrp.Position).magnitude < range  then
					
					if not enterButton.Visible then
						enterButton.Visible = true
						
					end
					
				else
					
					if enterButton.Visible then enterButton.Visible = false end
					exitPart = exit
				end
			end
		end
	end
end)