My character loading script does not work? (solved cus im dumb)

So, I am trying to make it so my dummy model copys the player model of the player when they join. It works just fine when I put a direct userid in. However, when I try to grab the user ID from the player when they join, it doesn't work. I get the error "Userid is not a valid member of player" Any help is appreciated

function playerAdded(player)
    if player.name ~= "ROBLOX" then


    game.Workspace.dummyloader.Configuration.userId.Value = player.Userid
    end
end

game.Players.PlayerAdded:Connect(playerAdded)