Fetch.php

<?php
/**
 *
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

namespace Magento\Paypal\Controller\Adminhtml\Paypal\Reports;

use Magento\Framework\Controller\ResultFactory;

class Fetch extends \Magento\Paypal\Controller\Adminhtml\Paypal\Reports
{
    /**
     * Authorization level of a basic admin session
     *
     * @see _isAllowed()
     */
    const ADMIN_RESOURCE = 'Magento_Paypal::fetch';

    /**
     * Forced fetch reports action
     *
     * @return \Magento\Backend\Model\View\Result\Redirect
     */
    public function execute()
    {
        try {
            $reports = $this->_settlementFactory->create();
            /* @var $reports \Magento\Paypal\Model\Report\Settlement */
            $credentials = $reports->getSftpCredentials();
            if (empty($credentials)) {
                throw new \Magento\Framework\Exception\LocalizedException(
                    __('We found nothing to fetch because of an empty configuration.')
                );
            }
            foreach ($credentials as $config) {
                try {
                    $fetched = $reports->fetchAndSave(
                        \Magento\Paypal\Model\Report\Settlement::createConnection($config)
                    );
                    $this->messageManager->addSuccessMessage(
                        __(
                            'We fetched %1 report rows from "%2@%3."',
                            $fetched,
                            $config['username'],
                            $config['hostname']
                        )
                    );
                } catch (\Exception $e) {
                    $this->messageManager->addExceptionMessage(
                        $e,
                        __('We can\'t fetch reports from "%1@%2."', $config['username'], $config['hostname'])
                    );
                }
            }
        } catch (\Exception $e) {
            $this->messageManager->addExceptionMessage($e, $e->getMessage());
        }

        /** @var \Magento\Backend\Model\View\Result\Redirect $resultRedirect */
        $resultRedirect = $this->resultFactory->create(ResultFactory::TYPE_REDIRECT);
        return $resultRedirect->setPath('*/*/index');
    }
}