reorganize and cleanup php server code

server/app/Http/Requests/User/CreateUserRequest.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Vanguard\Http\Requests\User;
+
+use Vanguard\Http\Requests\Request;
+use Vanguard\User;
+
+class CreateUserRequest extends Request
+{
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array
+     */
+    public function rules()
+    {
+        $rules = [
+            'email' => 'required|email|unique:users,email',
+            'username' => 'nullable|unique:users,username',
+            'password' => 'required|min:6|confirmed',
+            'birthday' => 'nullable|date',
+            'role_id' => 'required|exists:roles,id',
+            'verified' => 'boolean'
+        ];
+
+        if ($this->get('country_id')) {
+            $rules += ['country_id' => 'exists:countries,id'];
+        }
+
+        return $rules;
+    }
+}