How to use the ledfx.config.save_config function in LedFx

async def delete(self, device_id) -> web.Response:
        device = self._ledfx.devices.get(device_id)
        if device is None:
            response = { 'not found': 404 }
            return web.Response(text=json.dumps(response), status=404)

        self._ledfx.devices.destroy(device_id)

        # Update and save the configuration
        self._ledfx._config['devices'] = [device for device in self._ledfx._config['devices'] if device['id'] != device_id]
        save_config(
            config = self._ledfx._config, 
            config_dir = self._ledfx._config_dir)

        response = { 'status' : 'success' }
        return web.Response(text=json.dumps(response), status=200)

async def delete(self, device_id) -> web.Response:
        device = self._ledfx.devices.get(device_id)
        if device is None:
            response = { 'not found': 404 }
            return web.Response(text=json.dumps(response), status=404)

        device.clear_effect()
        self._ledfx.devices.destroy(device_id)

        # Update and save the configuration
        self._ledfx.config['devices'] = [device for device in self._ledfx.config['devices'] if device['id'] != device_id]
        save_config(
            config = self._ledfx.config, 
            config_dir = self._ledfx.config_dir)

        response = { 'status' : 'success' }
        return web.Response(text=json.dumps(response), status=200)

return web.Response(text=json.dumps(response), status=500)

        device_id = generate_id(device_config.get('name'))
        # Remove the device it if already exist?

        # Create the device
        _LOGGER.info("Adding device of type {} with config {}".format(device_type, device_config))
        device = self._ledfx.devices.create(
            id = device_id,
            type = device_type,
            config = device_config,
            ledfx = self._ledfx)

        # Update and save the configuration
        self._ledfx.config['devices'].append({'id': device.id, 'type': device.type, 'config': device.config })
        save_config(
            config = self._ledfx.config, 
            config_dir = self._ledfx.config_dir)

        response = { 'status' : 'success', 'device': { 'type': device.type, 'config': device.config, 'id': device.id }}
        return web.Response(text=json.dumps(response), status=200)

print('Stopping LedFx.')

        # Fire a shutdown event and flush the loop
        self.events.fire_event(LedFxShutdownEvent())
        await asyncio.sleep(0, loop=self.loop)

        await self.http.stop()

        # Cancel all the remaining task and wait
        tasks = [task for task in asyncio.Task.all_tasks() if task is not
             asyncio.tasks.Task.current_task()] 
        list(map(lambda task: task.cancel(), tasks))
        results = await asyncio.gather(*tasks, return_exceptions=True)

        # Save the configuration before shutting down
        save_config(config=self.config, config_dir=self.config_dir)

        await self.flush_loop()
        self.executor.shutdown()
        self.exit_code = exit_code
        self.loop.stop()

return web.Response(text=json.dumps(response), status=500)

        device_id = generate_id(device_config.get('name'))
        # Remove the device it if already exist?

        # Create the device
        _LOGGER.info("Adding device of type {} with config {}".format(device_type, device_config))
        device = self._ledfx.devices.create(
            id = device_id,
            type = device_type,
            config = device_config,
            ledfx = self._ledfx)

        # Update and save the configuration
        self._ledfx._config['devices'].append({'id': device.id, 'type': device.type, 'config': device.config })
        save_config(
            config = self._ledfx._config, 
            config_dir = self._ledfx._config_dir)

        response = { 'status' : 'success', 'device': { 'type': device.type, 'config': device.config, 'id': device.id }}
        return web.Response(text=json.dumps(response), status=200)