MessagingService.php

public function sendNotification($arrToken = array(), $title = null, $body=null,  $type=null, $data = null){
        $response = Http::withHeaders(array(
            'Authorization' => 'key=AAAAAihLhJI:APA91bGKKkamUmF14q3v4ZqJs3Kz6d2CKGsoTGoFL-6Al30yw0rz4VSzeQn4Gewtqt2q5GE9GHd9pFn3O1D_xG_ys8FUKjWn7V5SK4f563Tjp1xh10-CgQVFD-AqrQOPdyYKYGbF6uVU',
            'Content-Type' => 'application/json'
        ))->post('https://fcm.googleapis.com/fcm/send',array(
            'registration_ids' => $arrToken,
            'notification' => array(
                'title' => "{$title}",
                'body' => "{$body}",
                'sound' => 'default'
            ),
            'data' => array(
                "sound" => "default",
                "type" => $type,
                'data' => $data,
            ),
        ));
        return json_decode($response->body());
    }