move code to a function and add usage options

rmuser

@@ -3,6 +3,15 @@ CONFIG=./setenv
 
 . $CONFIG
 
+if [ -z $1 ]
+then
+  echo -e "Usage: `basename $0` [ username ]"
+else
+  remove_user $1
+fi
+
+remove_user()
+{
   echo "This will remove user account $1 from Thunix."
   echo "It is assumed the user account has been un-enforced in Ansible as well."
 
@@ -20,4 +29,4 @@ echo "Deleting account from system..."
   sudo userdel $1
 
   echo "User $1 removed from system.  Make sure user is unenforced in ansible." | sudo mail -s "User Account $1 removed from Thunix" $ADMIN_EMAIL
-
+}