code: public function send($notifiable, Notification $notification)
      {
          if (! $channel = $notifiable->routeNotificationFor('discord')) {
              return;
          }
  
          $message = $notification->toDiscord($notifiable);
  
          return $this->discord->send($channel, [
              'content' => $message->body,
              'embed' => $message->embed,
          ]);
      }
docs: Send the given notification.
  
  @param mixed $notifiable
  @param \Illuminate\Notifications\Notification $notification
  
  @return array
  
  @throws \NotificationChannels\Discord\Exceptions\CouldNotSendNotification