login welcome text

hi I have a login on top o my nav bar.
the only thing i miss is a welcome text when a user is logged in.

can you achieve that with this code?

function add_login_logout_link($items, $args)
{
if( $args->theme_location == 'Top Navigation' ) {
  if(is_user_logged_in())
  {
    $newitems = $items;
    $newitems .= '<li><a title="Logout" href="'. wp_logout_url('index.php') .'">Logout</a></li>';
  }
  else
  {
    $newitems = $items;
    $newitems .= '<li><a title="Login" href="'. wp_login_url('wp-admin/index.php') .'">Login</a></li>';
  }

  return $newitems;
 } else {
   return $items;
 }
}
add_filter('wp_nav_menu_items', 'add_login_logout_link', 10, 2);