source: app/Notifications/ForgotPassword.php

<?php

namespace App\Notifications;

use App\Models\User;
use Illuminate\Bus\Queueable;
use Illuminate\Notifications\Notification;
use Illuminate\Notifications\Messages\MailMessage;

class ForgotPassword extends Notification
{
    use Queueable;

    private $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)
    {
        return (new MailMessage)
                    ->greeting("Hello " . $this->user->name)
                    ->line("To change your password click on the button")
                    ->line("Your security code is: " . $this->user->security_code )
                    ->action("Change Password", url("/auth/new-password/" . $this->user->id . "/" . $this->user->verify_token));
    }

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