async handleUserNotification(message) {
    const notification = new UserNotification({
      action: message.action,
      collection: message.collection,
      controller: message.controller,
      index: message.index,
      node: this.remoteNodeId,
      protocol: message.protocol,
      result: JSON.parse(message.result),
      status: message.status,
      timestamp: message.timestamp.toNumber(),
      user: message.user,
      volatile: JSON.parse(message.volatile),
    });

    return global.kuzzle.ask(
      "core:realtime:user:sendMessage",
      message.room,
      notification,
    );
  }
Handles messages about user notifications

@param {Object} message - decoded UserNotification protobuf message
@return {void}