codigo actual del servidor, con avances de joan

app/Http/Resources/V2/Seller/AttributeCollection.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Http\Resources\V2\Seller;
+
+use Illuminate\Http\Resources\Json\JsonResource;
+
+class AttributeCollection extends JsonResource
+{
+    /**
+     * Transform the resource into an array.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @return array|\Illuminate\Contracts\Support\Arrayable|\JsonSerializable
+     */
+    public function toArray($request)
+    {
+        return [
+            'id'                =>(int) $this->id,
+            'name'              =>$this->name,
+            'values'              => $this->attribute_values
+        ];
+    }
+}