How to remove roblox leaderboard to use mine?

i can not find the option to hide it the default leaderboard

Use game.StarterGui:SetCoreGuiEnabled("PlayerList",false). This is the most effective way of doing it.

Note: The code has to be in a LocalScript or it probably won't work correctly

Try this

function onPlayerEntered(newPlayer)

    local stats = Instance.new("IntValue")
    stats.Name = "leaderstats"

    local cash = Instance.new("IntValue")
    cash.Name = "Score" --Change score to the name of the leaderboard
    cash.Value = 0

    cash.Parent = stats
    stats.Parent = newPlayer
end

game.Players.ChildAdded:connect(onPlayerEntered)