> For the complete documentation index, see [llms.txt](https://docs.mpush.cloud/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mpush.cloud/flutter-sdk/register-to-topics.md).

# Register to topics

Once you have a notification token you can register this device to push notifications and register to topics:

```dart
MPush.onToken = (token) async {
  print("Token received $token");
  await MPush.registerDevice(token).catchError(
    (error) => print(error),
  );
  await MPush.registerToTopic(MPTopic(code: 'Topic')).catchError(
    (error) => print(error),
  );
  print('Registered');
};
```

The topic are instances of the `MPTopic` class which has 3 properties:

* `code`: the id of the topic
* *\[Optional]* `title`: the readable title of the topic that will be displayed in the dashboard, if this is not set it will be equal to `code`.
* *\[Optional]* `single`: if this topic represents a single device or a group of devices, by default `false`.