addCommandHandler("group", 
function(thePlayer)
    if exports.acl:isPlayerInGroup(thePlayer, "ev") or exports.acl:isPlayerInGroup(thePlayer, "admin") then
        triggerClientEvent(thePlayer, "createWindow", getRootElement())
        triggerClientEvent(thePlayer, "fillagrid", getRootElement())
        triggerClientEvent(thePlayer, "fillcgrid", getRootElement())
        triggerClientEvent(thePlayer, "fillugrid", getRootElement())
    end
end
)
function addGroup(thePlayer, group)
	local playerToAdd = getPlayerAccount(thePlayer)
    if not exports.acl:isPlayerInGroup(playerToAdd, group)then
        exports.acl:addAccountToGroup(playerToAdd,group)
        exports.msj:sendMessage("You've been added to: " ..group.. "!", 0, 150, 0,thePlayer)
    end
end
addEvent("addPlayerToGroup", true)
addEventHandler("addPlayerToGroup", root, addGroup)
function removeGroup(thePlayer, group)
    local playerToRemove = getPlayerAccount(thePlayer)
    if exports.acl:isPlayerInGroup(playerToAdd, group) then
        exports.acl:removeAccountFromGroup(playerToRemove,group)
        exports.msj:sendMessage("You've been removed from: " ..group.. "!", 0, 150, 0,thePlayer)
    end
end
addEvent("removePlayerFromGroup", true)
addEventHandler("removePlayerFromGroup", root, removeGroup)
	try this