Making a Trail Appear on a Certain Player, is it possible?

So i have been Trying To Figure Out How i Can make a script for my trail object so that it appears for a player that might have bought a gamepass? or just in general for the creator's of that game. Here is what i have so far and i did have iLordOfAviation Help me with it but what he said didnt help much XD

game.Players.PlayerAdded:Connect(function(player)
	if player.Name == "your username" then
		local Trail =game.ServerStorage["Rainbow Trail"]

game.Players.PlayerAdded:Connect(function(plr)
	plr.CharacterAdded:Connect(function(char)
		local plrTrail = Trail:Clone()
		plrTrail.Parent = char.Torso
		plrTrail.Attachment0 = char.Head.FaceFrontAttachment
		plrTrail.Attachment1 = char.Torso.WaistBackAttachment
	end
end)

I Doubt this was Good Information XD Sorry if i messed up

I think you should move over Rainbow Trial to ReplicatedStorage

game.Players.PlayerAdded:Connect(function(player)
    if player.Name == "your Name" then
        local Trail =game.ReplicatedStorage["Rainbow Trail"]

game.Players.PlayerAdded:Connect(function(plr)
    plr.CharacterAdded:Connect(function(char)
        local plrTrail = Trail:Clone()
        plrTrail.Parent = char.Torso
        plrTrail.Attachment0 = char.Head.FaceFrontAttachment
        plrTrail.Attachment1 = char.Torso.WaistBackAttachment
    end
end)

local Trail = game.ServerStorage["Rainbow Trail"]
game.Players.PlayerAdded:Connect(function(plr)
	plr.CharacterAdded:Connect(function(char)
	if plr.Name == "your username" then
		local plrTrail = Trail:Clone()
		plrTrail.Parent = char.HumanoidRootPart
		if char:FindFirstChild("UpperTorso") then
			plrTrail.Attachment0 = char.Head.FaceFrontAttachment
			plrTrail.Attachment1 = char.Torso.RootRigAttachment
		else
			plrTrail.Attachment0 = char.Head.FaceFrontAttachment
			plrTrail.Attachment1 = char.Torso.WaistBackAttachment
		end
	end)
	local character = script.Parent.Parent.Parent
end)