#!/bin/bash
#This one was easy to do simply but elegance was a harder target 
#the core of it was w | grep $@ 
#the "| cut -b 0-9" was necesarry for only the username
#the "test $@ = "" ||" prevents a grep error message on failure an if is OK to.

test $@ = "" || w | grep $@ | cut -b 1-9