How can I customize the error messages returned by spatie/laravel-authorize

1. Extend the Authorize Middleware:
Create a new middleware class that extends the `Spatie\Authorize\Middleware\Authorize` class. This will allow you to override the `handleUnauthorizedRequest` method.

php
   // app/Http/Middleware/Authorize.php
   namespace App\Http\Middleware;

   use Spatie\Authorize\Middleware\Authorize as BaseAuthorize;
   use Symfony\Component\HttpFoundation\Response;

   class Authorize extends BaseAuthorize
   {
       protected function handleUnauthorizedRequest($request, $ability = null, $model = null)
       {
           if ($request->expectsJson()) {
               return response()->json([
                   'message' => 'You are not authorized to perform this action.',
               ], Response::HTTP_FORBIDDEN);
           } else {
               return redirect()->guest(route('login'))
                   ->with('error', 'You are not authorized to perform this action.');
           }
       }
   }
   

In this example, we've overridden the `handleUnauthorizedRequest` method to provide a custom JSON response for API requests and a redirect with a flash error message for non-API requests.

2. Register the Custom Middleware:
Update your `app/Http/Kernel.php` file to use the custom `Authorize` middleware instead of the default one provided by the package.

php
   // app/Http/Kernel.php
   protected $routeMiddleware = [
       'can' => \App\Http\Middleware\Authorize::class,
       // ...
   ];
   

Now, whenever the `spatie/laravel-authorize` package throws an unauthorized access exception, your custom `Authorize` middleware will handle the response.

You can further customize the error messages or the response format to match your application's requirements. For example, you can return a more detailed error message, include additional data in the response, or handle the exception in a different way (e.g., logging the event, sending a notification, etc.).

By extending the default middleware and overriding the `handleUnauthorizedRequest` method, you can ensure that the error messages and responses returned by the `spatie/laravel-authorize` package align with your application's design and user experience.