fix some problems

app/Http/Resources/MedicalCenterResource.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Http\Resources;
+
+use App\Services\Media\Resources\MediaResource;
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+class MedicalCenterResource extends JsonResource
+{
+    /**
+     * Transform the resource into an array.
+     *
+     * @param Request $request
+     * @return array
+     */
+    public function toArray( $request )
+    {
+        return [
+            'id' => $this->id ,
+            'name' => $this->name ,
+            'address' => $this->address ,
+            'phone_number' => $this->phone_number ,
+            'city' => $this->when( $this->city , $this->city ),
+            'created_at' => $this->created_at,
+            'updated_at' => $this->updated_at
+        ];
+    }
+}