trying to add local hitsounds to weapons Kit- SoundID not valid member of workspace?

I'm attempting to add hitsounds upon damaging player (ala quake,tf2 etc) to the roblox weapons kit and running into what is likely a basic error: Here's the weapons kit for reference https://developer.roblox.com/en-us/articles/weapons-kit

In WeaponsGUI there's existing code which is called to indicate damage numbers to the client, which resides under replicatedstorage/weaponsystem/Libraries/ I've piggy backed off this logic and added the following lines (between start hitsound code/end hitsound code) to try and play a hitsound locally for the client.

function WeaponsGui:OnHitOtherPlayer(damage, humanoidHit) -- show hit indicator, then fade 
	self.hitMarker.ImageTransparency = 0
	local tweenInfo = TweenInfo.new(0.8)
	local goal = {}
	goal.ImageTransparency = 1
	local tween = TweenService:Create(self.hitMarker, tweenInfo, goal)
	tween:Play()

	DamageBillboardHandler:ShowDamageBillboard(damage, humanoidHit.Parent:FindFirstChild("Head"))
	
	--start hitsound code--
	local SoundService = game:GetService("SoundService")
	local sound = Instance.new("Sound", game.Workspace)
	sound.SoundID = "rbxassetid://4868633804"
	SoundService:PlayLocalSound(sound)
	
	----end hitsound code ---
end

However the following error occurs: SoundID is not a valid member of Sound "Workspace.Sound". This is probably super simple, but as a beginner I'm not grasping what the proper references would be with this structure, and haven't found folks running into a similar issue.

Also the sound file itself currently is parked under StarterGUI- do I need to move the actual sound file somewhere else?

Appreciate any pointers, thanks!

That's an easy fix! As seen on the API reference for the Sound object, the property is called SoundId not SoundID