<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../../../lib/internal/Magento/Framework/ObjectManager/etc/config.xsd">
<preference for="MagentoCustomerControllerAjaxLogin" type="Your_CompanyYour_ModuleControllerAjaxLogin" />
</config>

if (!$this->getScopeConfig()->getValue('customer/startup/redirect_dashboard') && $redirectRoute) {
    $response['redirectUrl'] = $this->_redirect->success($redirectRoute);
    $this->getAccountRedirect()->clearRedirectCookie();
}

$response['redirectUrl'] = $this->_redirect->success($this->_url->getUrl("customer/account"));

if (redirectUrl) {
    window.location.href = redirectUrl;
} else if (response.redirectUrl) {
    window.location.href = response.redirectUrl;
} else {
    location.reload();
}

if (response.redirectUrl) {
    window.location.href = response.redirectUrl;
} else if (redirectUrl) {
    window.location.href = redirectUrl;
} else {
    location.reload();
}

var config = {
    map: {
        '*': {
            'Magento_Customer/js/action/login': 'YourCompany_YourModule/js/login'
        }
    }
};