Postgres asking unknown password
installing PostgreSQL for my Django Project. (vent) my_name@Name-MBP dir % createuser my_user
createuser: error: connection to server on socket "/tmp/.s.PGSQL.5432" failed: FATAL: password authentication failed for user "my_name"
Problem: I do not specify any password for user "my_name" and don't even create such user. HELP PLEASE!!!