newsupernova/vendor/magento/module-customer/view/frontend/templates/account/authentication-popup.phtml

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

// @codingStandardsIgnoreFile

/** @var \Magento\Customer\Block\Account\AuthenticationPopup $block */
?>
<div id="authenticationPopup" data-bind="scope:'authenticationPopup'" style="display: none;">
    <script>
        window.authenticationPopup = <?= /* @noEscape */ $block->getSerializedConfig() ?>;
    </script>
    <!-- ko template: getTemplate() --><!-- /ko -->
    <script type="text/x-magento-init">
        {
            "#authenticationPopup": {
                "Magento_Ui/js/core/app": <?= /* @noEscape */ $block->getJsLayout() ?>
            },
            "*": {
                "Magento_Ui/js/block-loader": "<?= $block->escapeJs($block->escapeUrl($block->getViewFileUrl('images/loader-1.gif'))) ?>"
            }
        }
    </script>
</div>