Trying to award a badge, but can't reference userId?

How do I reference userId????

sorry, It's a really long script but it does something specific. problem is on line 5/10

local badgeID = 2124476391
local bs = game:GetService("BadgeService")
local userId = Player.userId
local Knock = script.Parent.Knock
local a = script.Parent

while true do
	wait(math.random(10,15))
	Knock:Play()
	bs:AwardBadge(userId,badgeID)
	a.Material = "SmoothPlastic"
	script.Parent.SurfaceLight.Brightness = 0
	wait(.05)
	a.Material = "Neon"
	script.Parent.SurfaceLight.Brightness = 0.5
	wait(.05)
	a.Material = "SmoothPlastic"
	script.Parent.SurfaceLight.Brightness = 0
	wait(1.9)
	a.Material = "Neon"
	script.Parent.SurfaceLight.Brightness = 0.3
	wait(.1)
	script.Parent.SurfaceLight.Brightness = 0.6
	wait(.1)
	script.Parent.SurfaceLight.Brightness = 1
	wait(.4)
	a.Material = "SmoothPlastic"
	wait(.05)
	a.Material = "Neon"
	script.Parent.SurfaceLight.Brightness = 0.5
	wait(.05)
	a.Material = "SmoothPlastic"
	script.Parent.SurfaceLight.Brightness = 0
	wait(1.5)
	a.Material = "Neon"
	script.Parent.SurfaceLight.Brightness = 0.3
	wait(.1)
	script.Parent.SurfaceLight.Brightness = 0.6
	wait(.1)
	script.Parent.SurfaceLight.Brightness = 1
	wait(.5)
	a.Material = "SmoothPlastic"
	wait(.05)
	a.Material = "Neon"
	script.Parent.SurfaceLight.Brightness = 0.5
	wait(.05)
	a.Material = "SmoothPlastic"
	script.Parent.SurfaceLight.Brightness = 0
	wait(1.4)
	a.Material = "Neon"
	script.Parent.SurfaceLight.Brightness = 0.3
	wait(.1)
	script.Parent.SurfaceLight.Brightness = 0.6
	wait(.1)
	script.Parent.SurfaceLight.Brightness = 1
end

You just didn't put Player as a variable... I don't know if you're trying to do a touched or something but if it is a player joined then do

game.Players.PlayerAdded:Connect(function(Player)
local badgeID = 2124476391
local bs = game:GetService("BadgeService")
local userId = Player.userId
local Knock = script.Parent.Knock
local a = script.Parent

while true do
    wait(math.random(10,15))
    Knock:Play()
    bs:AwardBadge(userId,badgeID)
    a.Material = "SmoothPlastic"
    script.Parent.SurfaceLight.Brightness = 0
    wait(.05)
    a.Material = "Neon"
    script.Parent.SurfaceLight.Brightness = 0.5
    wait(.05)
    a.Material = "SmoothPlastic"
    script.Parent.SurfaceLight.Brightness = 0
    wait(1.9)
    a.Material = "Neon"
    script.Parent.SurfaceLight.Brightness = 0.3
    wait(.1)
    script.Parent.SurfaceLight.Brightness = 0.6
    wait(.1)
    script.Parent.SurfaceLight.Brightness = 1
    wait(.4)
    a.Material = "SmoothPlastic"
    wait(.05)
    a.Material = "Neon"
    script.Parent.SurfaceLight.Brightness = 0.5
    wait(.05)
    a.Material = "SmoothPlastic"
    script.Parent.SurfaceLight.Brightness = 0
    wait(1.5)
    a.Material = "Neon"
    script.Parent.SurfaceLight.Brightness = 0.3
    wait(.1)
    script.Parent.SurfaceLight.Brightness = 0.6
    wait(.1)
    script.Parent.SurfaceLight.Brightness = 1
    wait(.5)
    a.Material = "SmoothPlastic"
    wait(.05)
    a.Material = "Neon"
    script.Parent.SurfaceLight.Brightness = 0.5
    wait(.05)
    a.Material = "SmoothPlastic"
    script.Parent.SurfaceLight.Brightness = 0
    wait(1.4)
    a.Material = "Neon"
    script.Parent.SurfaceLight.Brightness = 0.3
    wait(.1)
    script.Parent.SurfaceLight.Brightness = 0.6
    wait(.1)
    script.Parent.SurfaceLight.Brightness = 1
end
end)

And if you're not doing a player added, then set a player