server

--- SERVER SIDE

addEventHandler ( 'onPlayerLogin', getRootElement ( ),
function ( _, theCurrentAccount )
    local acc = getAccountName(theCurrentAccount)
    triggerClientEvent(getLoginPlayers(), "setOnline", resourceRoot, acc)
end
)

addEventHandler ( 'onPlayerLogout', getRootElement ( ),
function ( prevAcc, theCurrentAccount )
    local acc = getAccountName(prevAcc)
    triggerClientEvent(getLoginPlayers(), "setOffline", resourceRoot, acc)
end
)

function getLoginPlayers()
	local loginPlayers = {}
	for _,player in ipairs(getElementsByType("player")) do
		if not isGuestAccount(getPlayerAccount(player)) then
			table.insert(loginPlayers,player)
		end
	end
	return loginPlayers
end