function 58275_query_ver( $vars ){
  $vars[] = "location";
  $vars[] = "category";
  return $vars;
}

add_filter( 'query_vars', '58275_query_ver' );
//Add above code in function.php use below code to get the ver and use em however you want.
get_query_var('token');
get_query_var('username');