Thread: User question

I have started setting up phpPgAdmin and have come to the realization that I don't quite understand how postgres
handlesits user support. 
I understand that the pg_passwd command is used for pg_hba.conf file and I'm fine with that. I guess the thing I am
missingis the purpose of the password one can create before they do the pg_passwd by using createuser. What is that
reallyused for. I couldn't seem to find anything in the admin documentation. Thanks. 

--patrick