WordPress Login URL to Woocommerce

Hi everybody
I’ve some problems with the wordpress/woocomerce login/register process. The enfold template comes with a designed wordpress/woocomerce page [woocommerce_my_account]. now i would like to change all logins to this side. For this i make the follow script and put it in the functions.php but this script doesn’t work fine. i have errors with the aviabuilder. Please can you help me.

/**
* WP userlogin url redirect to WC my-account
* ------------------------------------------------------------------------------
*/

function wpum_admin_login_screen_redirect()
{
    global $pagenow;

    if ($pagenow == 'wp-login.php' && !is_user_logged_in()) {
        wp_redirect( wpum_get_core_page_url('login') );
        exit;
    }
}
add_action('init', 'woocommerce_my_account');

Thanks in advanced and best wishes
Thomas