How do I change this script to only award the gear once ever?

I have this gear which gives the person a gear if they have a badge:

badgeid = 468156809 -- id of badge needed
toolstorage = game.ServerStorage -- where to store the gear(s)
tools = {"[G] Alpha"} -- names of the tools (you can put as many as you want)

game.Workspace.ChildAdded:connect(function(c)
    if game.Players:GetPlayerFromCharacter(c) then
        p = game.Players:GetPlayerFromCharacter(c)
    else
        return
    end
    if game:GetService("BadgeService"):UserHasBadge(p.userId, badgeid) then
        for i,v in pairs(tools) do
        local clone = toolstorage:WaitForChild(v):Clone()
        clone.Parent = p.Backpack
        end
    end
end)

I was wondering how to change this to make it so the user can only obtain the gear ONCE, even if they rejoin the game, since gears will save when they leave.