If you are a member of GTAR...
>> Use your 9 digit NRDS number for your username and your last name is your default password (case sensitive).
If you are a non-member (MLS Only Participant or Subscriber)...
>> Use your 4 digit MLS ID for your username and your last name for your default password (case sensitive).

If you do not know your NRDS ID, you can find it on Realtor.org.