exchange/app/Notifications/VerifyEmail.php

<?php

namespace App\Notifications;
use App\User;
use App\VerifyUser;
use Illuminate\Bus\Queueable;
use Illuminate\Notifications\Notification;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Notifications\Messages\MailMessage;
//use Illuminate\Auth\Notifications\VerifyEmail as Notification;

class VerifyEmail extends Notification
{
    use Queueable;

    /**
     * Create a new notification instance.
     *
     * @return void
     */

    protected $verifyUser;
    public function __construct(VerifyUser $verifyUser)
    {
        $this->verifyUser = $verifyUser;
    }

    /**
     * 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)
    {
        $verifyUser = $this->verifyUser;
        $url = url('/user/verify/'.$verifyUser->token);
        $greeting = sprintf('Greetings %s!', $notifiable->name);
        return (new MailMessage)
                    ->greeting($greeting)
                    ->subject("Email Verification")
                    ->line('Please verify your email to complete your registration with Exchange.')
                    ->action('Verify Your Email', $url)
                    ->line('Thank you for using our application!');
    }

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