Added createCustomerGraphQl plugin

Author: sedonik

app/code/Magento/CustomerGraphQl/Model/Plugin/Customer/CreateCustomerAccount.php

@@ -0,0 +1,60 @@
+<?php
+/**
+ *
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types = 1);
+
+namespace Magento\CustomerGraphQl\Model\Plugin\Customer;
+
+use Magento\Store\Model\ScopeInterface;
+use Magento\Framework\App\Config\ScopeConfigInterface;
+
+/**
+ * Plugin to update is_subscribed param according to system config
+ */
+class CreateCustomerAccount
+{
+    /**
+     * Configuration path to newsletter active setting
+     */
+    const XML_PATH_NEWSLETTER_ACTIVE = 'newsletter/general/active';
+
+    /**
+     * @var ScopeConfigInterface
+     */
+    private $scopeConfig;
+
+    /**
+     * CreateCustomerAccount constructor.
+     *
+     * @param ScopeConfigInterface $scopeConfig
+     */
+    public function __construct(
+        ScopeConfigInterface $scopeConfig
+    ) {
+        $this->scopeConfig = $scopeConfig;
+    }
+
+    /**
+     * Before Executing method.
+     *
+     * @param \Magento\CustomerGraphQl\Model\Customer\CreateCustomerAccount $subject
+     * @param $data
+     * @return array
+     */
+    public function beforeExecute (
+        \Magento\CustomerGraphQl\Model\Customer\CreateCustomerAccount $subject, $data
+    ) {
+        if (!$this->scopeConfig->getValue(
+            self::XML_PATH_NEWSLETTER_ACTIVE,
+            ScopeInterface::SCOPE_STORE
+        )
+        ) {
+            $data['is_subscribed'] = false;
+        }
+
+        return [$data];
+    }
+}

app/code/Magento/CustomerGraphQl/etc/graphql/di.xml

@@ -6,6 +6,9 @@
  */
 -->
 <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
+    <type name="Magento\CustomerGraphQl\Model\Customer\CreateCustomerAccount">
+        <plugin name="createCustomerGraphQl" type="Magento\CustomerGraphQl\Model\Plugin\Customer\CreateCustomerAccount"/>
+    </type>
     <type name="Magento\CustomerGraphQl\Model\Customer\UpdateCustomerData">
         <arguments>
             <argument name="restrictedKeys" xsi:type="array">