this Developer Console is not working no errors?(GUI)

i am trying to make a gui that shows data to your game like how many players there is and other stuff.

Problem:

when a devloper of the game presses on the LeftShift the Console wont appear.

my Code:

local SGS = game.StarterGui.DEVONLY
local Plr = game.Players.LocalPlayer
local UserInputService = game:GetService("UserInputService")


game_makers = {539909602}




for i,v in pairs(game_makers) do
    if game.Players.LocalPlayer.UserId == v then
        UserInputService.InputBegan:Connect(function(input,gameprossideEvent)
            if input.KeyCode == Enum.KeyCode.LeftShift then
                if SGS.ScreenGui.Mainloop.Visible == false then
                    SGS.ScreenGui.Mainloop.Visible = true

                else
                    SGS.ScreenGui.Mainloop.Visible = false              
                end
            end 
        end)        
    else
        print("YOU ARE NOT A DEV!!!")


    end
end

is there any reason for this code to not work?