This is a part of notification define who get the notification.
Recipient Type #
| Type | Data type | Description |
| Registration ids | Array | A unique token string that identifies each client app instance. The registration token is required for single device and device group messaging. Note that registration tokens must be kept secret. |
| Roles | Array | WordPress roles |
| Users | Array | WordPress users |
| Email/Merge tag | String | Is email or dynamic information from variable |
| Topic | String | The name of topic devices subscribed Noted: Cirilla default subscribe to topic “android” or “ios” |
Ref: https://mpa-media.com/docs/getting-started/#how-does-push-notification-work
