I'm making an admin panel and the player list wont update?

So the gui will list the players in a server but it will not update upon a player leaving/joining unless you rejoin or reset.

any help?

here's the code to update it

local pos = 0
function update()
    pos = 0
    for k,v in pairs(frame.Plays:GetChildren())do
        v:remove()
    end
    local players = game.Players:GetPlayers()
    for i = 1, #players do
        local label = Instance.new("TextLabel",frame.Plays)
        label.Size = UDim2.new(0.425,0,0.04,0)
        label.TextScaled = true
        label.Text = players[i].Name
        label.Position = label.Position + UDim2.new(0,0,pos,0)
        pos = pos +.04
    end
end
game.Players.PlayerAdded:connect(function(player)
    update()repeat wait() until player.Character
    player.Character.Humanoid.Changed:connect(function()
        update()
    end)
end)
game.Players.PlayerRemoving:connect(function()
    update()
end)
update()