For Roblox (Straight from wiki) (I think lmao)

local admins = {''} --//Your name

function tableContains(t)
    for i,v in pairs(t, value) do
        if v == value then
            return true
        end
    return false
end

function onChatted(message, player)
    if message == ':load map1' and tableContains(admins, player.Name) then
        game.ServerStorage.Maps.Map1.Parent = game.Workspace
    end
end

game.Players.PlayerAdded:connect(function(player)
    player.Chatted:connect(function(message) onChatted(message, player) end)
end)