Send Slack Notification in Laravel 11

.env

SLACK_BOT_USER_OAUTH_TOKEN=
SLACK_BOT_USER_DEFAULT_CHANNEL=

OrderNotification.php

<?php
// app/Notification/OrderNotification.php
namespace App\Notifications;

use App\Models\User;
use Illuminate\Bus\Queueable;
use Illuminate\Notifications\Notification;
use Illuminate\Notifications\Slack\BlockKit\Blocks\ContextBlock;
use Illuminate\Notifications\Slack\BlockKit\Blocks\SectionBlock;
use Illuminate\Notifications\Slack\SlackMessage;

class OrderNotification extends Notification
{
    use Queueable;

    /**
     * Create a new notification instance.
     */
    public function __construct(public User $user)
    {
        $this->user = $user;
    }

    /**
     * Get the notification's delivery channels.
     *
     * @return array<int, string>
     */
    public function via($notifiable)
    {
        return ['slack'];
    }

    public function toSlack(object $notifiable): SlackMessage
    {
        return (new SlackMessage)
            ->to("#general") // set the channel
            ->text('Check & update status.')
            ->headerBlock('New User Created')
            ->contextBlock(function (ContextBlock $block) {
                $block->text($this->user->name);
            })
            ->sectionBlock(function (SectionBlock $block) {
                $block->text($this->user->email);
                $block->field($this->user->created_at);
            })
            ->dividerBlock()
            ->sectionBlock(function (SectionBlock $block) {
                $block->text('Congratulations!');
            });;
    }
}

SlackService.php

<?php
// app/Services/SlackService.php
namespace App\Services;

class SlackService
{
    public function send(string $message): void {}
}

web.php

<?php

use App\Models\User;
use App\Notifications\OrderNotification;
use Illuminate\Support\Facades\Route;

Route::get('/', function () {
    // return view('welcome');
    $user = User::create([
        'name' => fake()->name(),
        'email' => fake()->email(),
        'password' => bcrypt('123456789'),
    ]);

    $user->notify(new OrderNotification($user));
});