send multiple emails using custom job in laravel-CodePudding

I tried to create a job in order to send emails to all users in the database I have done everything and connected successfully with Mailtrip but still have a problem : (Failed) when implementing the command:

PHP artisan queue:work

this is my ProductEmail class:

class ProductMail extends Mailable implements ShouldQueue
{
    use Queueable, SerializesModels;

    public $product;
    public $user;

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

    /**
     * Build the message.
     *
     * @return $this
     */
    public function build()
    {
        return $this->subject($this->product->name)
        ->view('email.product');
    }
}

and i have created the view for it>>>>

and here the job class

class NotifyUsersForProduct implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

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

     public $product;

    public function __construct(Product $product)
    {
        $this->$product = $product;
    }

    /**
     * Execute the job.
     *
     * @return void
     */
    public function handle()
    {
        $users = User::all();
        $users->map(function(User $user){
                Mail::to($user)->send(new ProductMail($this->product, $user));
        });
    }
}

and here i have use it

try {
             $product = Product::create([
                  'name' => $request->input('name'),
                  'price' => $request->input('price'),
                  'quantity' => $request->input('quantity'),
                  'user_id' => Auth::id(),
             ]);

        NotifyUsersForProduct::dispatch($product);

the error message:

CodePudding user response：

 public function __construct(Product $product)
{
    $this->$product = $product;
}

This should be:

 public function __construct(Product $product)
{
    $this->product = $product;
}

Remove $ and also i recommend to do this but not necessary:

 public function handle()
{
    $users = User::all();
    foreach($users as $user){
            Mail::to($user)->send(new ProductMail($this->product, $user));
    });
}

Hope it helps.