pex user <nome> group set default
   pex user <nome> group set youtube1k
   pex user <nome> group set youtube2k
   pex user <nome> group set youtube3k
   pex user <nome> group set youtube5k
   pex user <nome> group set youtube10k
   pex user <nome> group set youtube15k
   pex user <nome> group set youtube20k
   pex user <nome> group set youtube25k
   pex user <nome> group set  youtube30k
   pex user <nome> group set staff