controller to get the mailchimp list via ajax

Controller/Adminhtml/Lists/Get.php

@@ -0,0 +1,61 @@
+<?php
+/**
+ * mc-magento2 Magento Component
+ *
+ * @category Ebizmarts
+ * @package mc-magento2
+ * @author Ebizmarts Team <info@ebizmarts.com>
+ * @copyright Ebizmarts (http://ebizmarts.com)
+ * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
+ * @date: 4/20/17 3:20 PM
+ * @file: Get.php
+ */
+namespace Ebizmarts\MailChimp\Controller\Adminhtml\Lists;
+
+use Magento\Backend\App\Action;
+use Magento\Backend\App\Action\Context;
+use Magento\Framework\Controller\ResultFactory;
+
+class Get extends Action
+{
+    /**
+     * @var \Ebizmarts\MailChimp\Helper\Data
+     */
+    protected $_helper;
+    /**
+     * @var ResultFactory
+     */
+    protected $_resultFactory;
+
+    /**
+     * Get constructor.
+     * @param Context $context
+     * @param ResultFactory $resultFactory
+     * @param \Ebizmarts\MailChimp\Helper\Data $helper
+     */
+    public function __construct(
+        Context $context,
+        ResultFactory $resultFactory,
+        \Ebizmarts\MailChimp\Helper\Data $helper
+    )
+    {
+        parent::__construct($context);
+        $this->_resultFactory       = $resultFactory;
+        $this->_helper                  = $helper;
+
+    }
+    public function execute()
+    {
+        $param = $this->getRequest()->getParams();
+        $apiKey = $param['apikey'];
+        $api = $this->_helper->getApiByApiKey($apiKey);
+        $lists = $api->lists->getLists();
+        $result = [];
+        foreach($lists['lists'] as $list) {
+            $result[] = ['id'=> $list['id'], 'name'=> $list['name']];
+        }
+        $resultJson = $this->_resultFactory->create(ResultFactory::TYPE_JSON);
+        $resultJson->setData($result);
+        return $resultJson;
+    }
+}