source: app/Notifications/VerifyUser.php

<?php

namespace App\Notifications;

use App\Models\Company;
use App\Models\User;
use App\Services\Hashid;
use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Notifications\Messages\MailMessage;
use Illuminate\Notifications\Notification;

class VerifyUser extends Notification implements ShouldQueue
{
    use Queueable;

    protected $user;

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

    /**
     * Get the notification's delivery channels.
     *
     * @param mixed $notifiable
     * @return array
     */
    public function via($notifiable)
    {
        return ['mail'];
    }

    /**
     * Get the mail representation of the notification.
     *
     * @param mixed $notifiable
     * @return \Illuminate\Notifications\Messages\MailMessage
     */
    public function toMail($notifiable)
    {
        $hashId = new Hashid();

        return (new MailMessage)
            ->greeting("Login verification")
            ->line("To verify click the button and enter your security code.")
            ->line("Your security code is: " . $this->user->security_code)
            ->action("Verify", route("verify-login.index", [
                "id" => $hashId->encode($this->user->id),
                "token" => $this->user->verify_token
            ]));
    }

    /**
     * Get the array representation of the notification.
     *
     * @param mixed $notifiable
     * @return array
     */
    public function toArray($notifiable)
    {
        return [
            //
        ];
    }
}