changePlayerName

function editGridlistForEveryone(plr, r)
    guiGridListSetItemText(adminGrid, r, 0, getPlayerName(plr))
end
addEvent("onServerApproved", true)
addEventHandler("onServerApproved", root, editGridlistForEveryone)

function getPlayerGridRow(plr)
    local i = 0
    local n = guiGridListGetRowCount(adminGrid)
    while (i < n) do
        local text = guiGridListGetItemText(adminGrid, i, 1)
        local player = getPlayerFromName(text)
        if (player == plr) then
            return i
        end
        i = i + 1
    end
    return -1
end

function onNameChanged(plr)
    r = getPlayerGridRow(plr)
    if (not (r > -1)) then
        return false
    end
    triggerServerEvent("onPlayerChangedName", root, plr, r) -- You'll simply call a client-sided event in the server-sided code. Let's say the event is called "onServerApproved".
end
addEventHandler("onClientPlayerChangeNick", root, onNameChanged)