sudo to a certain user and show export / xauth commands to use your X session as the specified user

sudouser.sh

#!/bin/bash
echo export DISPLAY=$DISPLAY
echo export XAUTHORITY=$(grep ^$1: /etc/passwd|cut -d: -f6|head -n1)/.Xauthority
echo xauth add $(xauth list|grep ^$(uname -n))
sudo -i -u ${1}