Push Notification (android/ios) using LaravelNotificationChannels/FCM

I imported kreait/laravel-firebase package and generated the service-account JSON. i am trying to send a notification to android/ios using the Fcm channel provided by this package laravel-notification-channels/fcm:~2.0

I also added the firebase credentials to the .env file FIREBASE_CREDENTIALS=service-account.json

I added the following function to the notifiable model (users).

public function routeNotificationForFcm()
    {
        return $this->fcm_token;
    }

I ran the command make:notification followreq and this is the code:

namespace App\Notifications;

use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Notifications\Notification;
use NotificationChannels\Fcm\FcmChannel;
use NotificationChannels\Fcm\FcmMessage;
use NotificationChannels\Fcm\Resources\AndroidConfig;
use NotificationChannels\Fcm\Resources\AndroidFcmOptions;
use NotificationChannels\Fcm\Resources\AndroidNotification;
use NotificationChannels\Fcm\Resources\ApnsConfig;
use NotificationChannels\Fcm\Resources\ApnsFcmOptions;

class FollowReq extends Notification
{
    use Queueable;

    public function __construct()
    {
        //
    }

    public function via($notifiable): array
    {
        return [FcmChannel::class];
    }


    public function toFcm($notifiable)
    {
        return FcmMessage::create()
            ->setData(['data1' => 'value', 'data2' => 'value2'])
            ->setNotification(\NotificationChannels\Fcm\Resources\Notification::create()
                ->setTitle('Follow Request')
                ->setBody('Your account has been activated.')
                ->setImage('https://tikers.tech/img/core-img/favicon.ico'))
            ->setAndroid(
                AndroidConfig::create()
                    ->setFcmOptions(AndroidFcmOptions::create()->setAnalyticsLabel('analytics'))
                    ->setNotification(AndroidNotification::create()->setColor('#0A0A0A'))
            )->setApns(
                ApnsConfig::create()
                    ->setFcmOptions(ApnsFcmOptions::create()->setAnalyticsLabel('analytics_ios')));
    }

    // optional method when using kreait/laravel-firebase:^3.0, this method can be omitted, defaults to the default project
    public function fcmProject($notifiable, $message)
    {
        // $message is what is returned by `toFcm`
        return 'app'; // name of the firebase project to use
    }

}

I tried to send notification using this route (for testing purposes)

Route::get('/noti', function () {
    $user=\App\Models\User::select()->where('name','name')->first();
    $user->notify(new \App\Notifications\FollowReq());
});

but it is not working, can anyone guide me on how to use this fcm channel