If you do not remember the email address for your account, please contact the CSN Support Team for assistance. If you can change your password, there are no password reset intervals, so you can change your password as little or as often as you want. Search Email. Pintu Air Mas Group was established through a historic decision to form a real estate developer group in Jakarta and its vicinities. Go back to the Dashboard on www.csn.edu. The graphic to the left is created with