getMonitorChartData(monitorID, period, callback) {
            socket.emit("getMonitorChartData", monitorID, period, callback);
        }
Retrieves monitor chart data.
@param {string} monitorID - The ID of the monitor.
@param {number} period - The time period for the chart data, in hours.
@param {socketCB} callback - The callback function to handle the chart data.
@returns {void}