Script disk quota

I have a script that gives new users a folder when they log in for the first time:

@echo off 
IF exist %USERPROFILE%\Desktop\%USERNAME% 
     (echo %USERNAME% exists) 
ELSE 
     (mkdir %USERPROFILE%\Desktop\%USERNAME% && echo %USERNAME% created)

I would like to know if you can automate a little more and add that you also assign a disk quota.

@echo off 
IF exist %USERPROFILE%\Desktop\%USERNAME% ( echo %USERNAME% exists ) ELSE ( mkdir %USERPROFILE%\Desktop\%USERNAME% && echo %USERNAME% created)

colDiskQuotas.Initialize "%USERPROFILE%\Desktop\%USERNAME%", True

set objUser = colDiskQuotas.FindUser("%USERNAME%")
objUser.QuotaLimit = 50000000