fix some problems

app/Http/Resources/UserResource.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Http\Resources;
+
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+class UserResource extends JsonResource
+{
+    /**
+     * Transform the resource into an array.
+     *
+     * @param  Request  $request
+     * @return array
+     */
+    public function toArray($request)
+    {
+        return [
+            'id' => $this->id,
+            'name' => $this->name,
+            'email' => $this->email,
+            'status' => $this->status,
+            'address' => $this->address,
+            'gender' => $this->gender,
+            'medical_center' => MedicalCenterResource::make($this->whenLoaded('medical_center')),
+            'created_at' => $this->created_at,
+            'updated_at' => $this->updated_at
+        ];
+    }
+}