How do I replace Press 'E' input service with tapped?

I have a door system, which when hovered over (with a mouse on a pc/mac), it displays a "Press 'E' to open", but now that it works, I have concerns with mobile devices, such as phones. Is there a function where it checks if the part was tapped on a mobile device?

(I know 'mouse' is considered a legacy function, but even on the devforum I couldn't find a replacement).

Also, is there a better method of security than the one I have? What mine does is that it changes the name of all the parts every 10 seconds.

localscript inside of the player:

--[[
	Definitions: 1-21
]]--
local security = require(game:GetService("ReplicatedStorage"):WaitForChild("security"))
local userInputService = game:GetService("UserInputService")
local players = game:GetService("Players")
	local player = players.LocalPlayer
	local mouse = player:GetMouse()
	local char = player.Character
	if not char or not char.Parent then
    	char = player.CharacterAdded:wait()
	end
local workSpace = game:GetService("Workspace")
local interactive = workSpace:WaitForChild("Interactive")
	local doors = interactive:WaitForChild(_G.Doors)
	local tools = interactive:WaitForChild(_G.Tools)
local replicatedStorage = game:GetService("ReplicatedStorage")
local doorEnabled = false
local door
local toolEnabled = false
local tool
--[[
	Functions: 22-36
--]]
local hideDoorGui = function()
	for i,v in pairs (doors:GetChildren()) do
		v:WaitForChild("Gui").Enabled = false
	end
	for i,v in pairs (tools:GetChildren()) do
		v:WaitForChild("Gui").Enabled = false
	end
	doorEnabled = false
	door = nil
	toolEnabled = false
	tool = nil
end

mouse.Move:Connect(function()
	local object = mouse.Target
	if object then
		if doors:FindFirstChild(object.Name) ~= nil then
			if (char.HumanoidRootPart.Position - object.Position).magnitude < 20 then
				doorEnabled = true
				door = object
				object:WaitForChild("Gui").Enabled = true
			end
		elseif tools:FindFirstChild(object.Name) ~= nil then
			if (char.HumanoidRootPart.Position - object.Position).magnitude < 20 then
				object:WaitForChild("Gui").Enabled = true
				toolEnabled = true
				tool = object
			end
			else
			hideDoorGui()
		end
	else
		hideDoorGui()
	end
end)

userInputService.InputBegan:connect(function(inputObject, gameProcessedEvent)
    if inputObject.KeyCode == Enum.KeyCode.E then
        if doorEnabled == true then
			if door ~= nil then
				replicatedStorage:WaitForChild("Door"):FireServer(door,char)
				print("Fired")
			end
		elseif toolEnabled == true then
			if tool ~= nil then
				replicatedStorage:WaitForChild("Tool"):FireServer(tool,tool:WaitForChild("toolType").Value)
				print("Fired")
			end
		end
    end 
end)

Events Script:

local replicatedStorage = game:GetService("ReplicatedStorage")
local TweenService = game:GetService("TweenService")
local openAnimation = Instance.new("Animation")
local pickupAnimation = Instance.new("Animation")
openAnimation.AnimationId = "http://www.roblox.com/Asset?ID=2822903669"
pickupAnimation.AnimationId = "http://www.roblox.com/Asset?ID=2823825483"

replicatedStorage.Door.OnServerEvent:Connect(function(p,door,char)
	local animTrack = char.Humanoid:LoadAnimation(openAnimation)
	if door:WaitForChild("Values"):WaitForChild("inMotion").Value ~= true then
		if door:WaitForChild("Values"):WaitForChild("isOpen").Value ~= true then
			door:WaitForChild("Sound"):Play()
			door:WaitForChild("Values"):WaitForChild("inMotion").Value = true
			animTrack:Play()
			local tween = TweenService:Create(door, TweenInfo.new(1,Enum.EasingStyle.Linear), {CFrame = door:WaitForChild("Positions"):WaitForChild("OpenDoorPos").CFrame}) tween:Play() tween.Completed:Wait()
			door:WaitForChild("Values"):WaitForChild("inMotion").Value = false
			door:WaitForChild("Values"):WaitForChild("isOpen").Value = true
			door:WaitForChild("Gui").TextLabel.Text = "Press 'E' to close"
		else
			door:WaitForChild("Sound"):Play()
			door:WaitForChild("Values"):WaitForChild("inMotion").Value = true
			animTrack:Play()
			local tween = TweenService:Create(door, TweenInfo.new(1,Enum.EasingStyle.Linear), {CFrame = door:WaitForChild("Positions"):WaitForChild("ClosedDoorPos").CFrame}) tween:Play() tween.Completed:Wait()
			door:WaitForChild("Values"):WaitForChild("inMotion").Value = false
			door:WaitForChild("Values"):WaitForChild("isOpen").Value = false
			door:WaitForChild("Gui").TextLabel.Text = "Press 'E' to open"
		end
	end
end)
replicatedStorage.Tool.OnServerEvent:Connect(function(p,tool,toolType)
	local animTrack = p.Character.Humanoid:LoadAnimation(pickupAnimation)
	animTrack:Play()
	game.ServerStorage.Tools:WaitForChild(toolType):Clone().Parent = p.Backpack
	tool:Destroy()
end)

Security Script:

local workSpace = game:GetService("Workspace")
local interactive = workSpace:WaitForChild("Interactive")
local security = require(game:GetService("ReplicatedStorage"):WaitForChild("security")) 
local interactive_doors = interactive:WaitForChild("Doors")
local interactive_tools = interactive:WaitForChild("Tools")
local generator = Random.new()
local name = ""
local code_characters = {
	--lower case letters
	"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z",
	--upper case letters
	"A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z",
	--numbers
	1,2,3,4,5,6,7,8,9,0,
	--special characters
	"`","~","!","@","#","$","%","^","&","*","(",")","-","_","=","+","{","}","[","]","\\","|",";",":","\"","\'",",","<",">",".","/","?"
}

wait(1)
while true do
	for i,v in pairs (interactive:GetChildren()) do
	v.Name = ""
	for i = 1, 100 do
		local newCharNum = generator:NextInteger(1, #code_characters)
		security.changeName(v,code_characters[newCharNum])
	end
	for i,q in pairs (v:GetChildren()) do
		q.Name = ""
		for i = 1, 100 do
			local newCharNum = generator:NextInteger(1, #code_characters)
			security.changeName(q,code_characters[newCharNum])
		end
	end
	end
	wait(10)
end

Thanks in advance! Dont hessitate to tell me if I could improve my code too

Make it so if touch enabled is true it adds a click detector to the part! Also gave you the part for adding xbox support too! Accept If this helped!

local door = game.Workspace.Door
local userInputService = game:GetService("UserInputService")
 
if userInputService.TouchEnabled then
	print("MOBILE")
Instance.new("ClickDetector",door)
elseif userInputService.GamePadEnabled
	print("XBOX")
end