Update

app/Providers/AppServiceProvider.php

@@ -3,6 +3,7 @@
 namespace App\Providers;
 
 use Illuminate\Database\Eloquent\Relations\Relation;
+use Illuminate\Http\Resources\Json\JsonResource;
 use Illuminate\Support\ServiceProvider;
 
 class AppServiceProvider extends ServiceProvider
@@ -20,6 +21,8 @@ class AppServiceProvider extends ServiceProvider
      */
     public function boot()
     {
+        JsonResource::withoutWrapping();
+
         $this->definePolymorphicTypes();
     }