diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..d9844a7
Binary files /dev/null and b/.DS_Store differ
diff --git a/Controller/.DS_Store b/Controller/.DS_Store
new file mode 100644
index 0000000..f0286dc
Binary files /dev/null and b/Controller/.DS_Store differ
diff --git a/Controller/Settings/Index.php b/Controller/Settings/Index.php
deleted file mode 100644
index 15523bb..0000000
--- a/Controller/Settings/Index.php
+++ /dev/null
@@ -1,125 +0,0 @@
-<?php
-
-namespace Airwallex\Payments\Controller\Settings;
-
-use Airwallex\Payments\Controller\Adminhtml\Configuration\SetUpdateSettingsMessage;
-use Airwallex\Payments\Helper\Configuration;
-use Exception;
-use Magento\Framework\App\Action\HttpPostActionInterface;
-use Magento\Framework\App\Cache\Manager;
-use Magento\Framework\App\CacheInterface;
-use Magento\Framework\App\Config\Storage\Writer;
-use Magento\Framework\App\CsrfAwareActionInterface;
-use Magento\Framework\App\ObjectManager;
-use Magento\Framework\App\Request\Http as RequestHttp;
-use Magento\Framework\App\Request\InvalidRequestException;
-use Magento\Framework\App\RequestInterface;
-use Magento\Framework\App\Response\Http as ResponseHttp;
-use Magento\Framework\Encryption\EncryptorInterface;
-
-class Index implements HttpPostActionInterface, CsrfAwareActionInterface
-{
-    private const HTTP_OK = 200;
-    private ResponseHttp $response;
-    private Writer $configWriter;
-    private RequestHttp $request;
-    private CacheInterface $cache;
-    public Configuration $configuration;
-    protected Manager $cacheManager;
-
-    public function __construct(
-        ResponseHttp $response,
-        Writer $configWriter,
-        RequestHttp $request,
-        CacheInterface $cache,
-        Configuration $configuration,
-        Manager $cacheManager
-    ) {
-        $this->response = $response;
-        $this->configWriter = $configWriter;
-        $this->request = $request;
-        $this->cache = $cache;
-        $this->configuration = $configuration;
-        $this->cacheManager = $cacheManager;
-    }
-
-    /**
-     * @return ResponseHttp
-     * @throws Exception
-     */
-    public function execute(): ResponseHttp
-    {
-        $data = json_decode($this->request->getContent(), true);
-        $tokenFromCache =  $this->cache->load(SetUpdateSettingsMessage::CACHE_NAME);
-        $this->cache->remove(SetUpdateSettingsMessage::CACHE_NAME);
-
-        $signature = $this->request->getHeader('x-signature');
-        if (!$signature) {
-            return $this->error('Signature id is required.');
-        }
-        $ts = $this->request->getHeader('x-timestamp') . $this->request->getContent();
-        if (hash_hmac('sha256', $ts, $tokenFromCache) !== $signature) {
-            return $this->error('Signature id is invalid.');
-        }
-
-        $clientId = $data['client_id'];
-        $apiKey = $data['api_key'];
-        $webhookKey = $data['webhook_secret'];
-        $accountId = $data['account_id'];
-        $accountName = $data['account_name'];
-        if (empty($clientId)) {
-            return $this->error('Client ID is required.');
-        }
-        if (empty($apiKey)) {
-            return $this->error('API Key is required.');
-        }
-        if (empty($webhookKey)) {
-            return $this->error('Webhook Key is required.');
-        }
-        if (empty($accountId)) {
-            return $this->error('Account id is required.');
-        }
-        if (empty($accountName)) {
-            return $this->error('Account name is required.');
-        }
-        $encryptor = ObjectManager::getInstance()->get(EncryptorInterface::class);
-        $mode =  substr($tokenFromCache, 0, 4) === 'demo' ? 'demo' : 'prod';
-        $account = $this->configuration->getAccount();
-        $arrAccount = $account ? json_decode($account, true) : [];
-        $arrAccount[$mode . '_account_id'] = $accountId;
-        $arrAccount[$mode . '_account_name'] = $accountName;
-        $this->configWriter->save('airwallex/general/' . 'account', json_encode($arrAccount));
-        $this->configWriter->save('airwallex/general/' . $mode . '_account_name', $accountName);
-        $this->configWriter->save('airwallex/general/' . $mode . '_client_id', $clientId);
-        $this->configWriter->save('airwallex/general/' . $mode . '_api_key', $encryptor->encrypt($apiKey));
-        $this->configWriter->save('airwallex/general/webhook_' . $mode . '_secret_key', $encryptor->encrypt($webhookKey));
-        $this->configWriter->save('airwallex/general/mode', $mode);
-        $this->cacheManager->flush(['config']);
-        $this->response->setBody(json_encode(['success' => true]));
-        return $this->response->setStatusCode(self::HTTP_OK);
-    }
-
-    /**
-     * @throws Exception
-     */
-    public function error(string $message)
-    {
-        throw new Exception($message);
-    }
-
-    public function createCsrfValidationException(RequestInterface $request): ?InvalidRequestException
-    {
-        return null;
-    }
-
-    /**
-     * @param RequestInterface $request
-     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
-     *
-     * @return bool|null
-     */
-    public function validateForCsrf(RequestInterface $request): ?bool
-    {
-        return true;
-    }
-}
diff --git a/etc/adminhtml/system/basic.xml b/etc/adminhtml/system/basic.xml
index 5f5dfc9..2a02748 100644
--- a/etc/adminhtml/system/basic.xml
+++ b/etc/adminhtml/system/basic.xml
@@ -7,9 +7,9 @@
             <source_model>Airwallex\Payments\Model\Config\Source\Mode</source_model>
             <config_path>airwallex/general/mode</config_path>
         </field>
-        <field id="update_settings" translate="label" type="button" sortOrder="15" showInDefault="1" showInWebsite="1" showInStore="1">
+        <!-- <field id="update_settings" translate="label" type="button" sortOrder="15" showInDefault="1" showInWebsite="1" showInStore="1">
             <frontend_model>Airwallex\Payments\Model\Config\Adminhtml\UpdateSettings</frontend_model>
-        </field>
+        </field> -->
         <field id="demo_client_id" translate="label" type="text" sortOrder="20" showInDefault="1" showInWebsite="1" showInStore="1">
             <label>Demo Client ID</label>
             <config_path>airwallex/general/demo_client_id</config_path>