How do you create the first user in Cassandra DB

Question

How does one create the first user in a cassandra database?

I tried:

CREATE USER username WITH PASSWORD \"\";

and its says:

Answer 1

To start to use authentication, the default superuser username/password pair is cassandra/cassandra. This should fix the chicken and egg problem.

Source: http://www.datastax.com/docs/datastax_enterprise3.0/security/native_authentication