Create redirect from WP native login form to UM login form

Redirect from WP native login form

/**
 * Replace login page URL to UM login page
 * @param string $login_url
 * @param string $redirect
 * @return string
 */
function um_login_url( $login_url, $redirect ){
    $page_id = UM()->options()->get( 'core_login' );
    if ( get_post( $page_id ) ) {
        $login_url = add_query_arg( 'redirect_to', urlencode( $redirect ), get_permalink( $page_id ) );
    }
    return $login_url;
}
add_filter('login_url', 'um_login_url', 10, 2);