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

Change

authenticator: AllowAllAuthenticator 

To

authenticator: PasswordAuthenticator 

in cassandra.yamlconfiguration file and restart Cassandra.

This will create a superuser cassandra for you with the restart. Make sure you have Phthon27, thrift-0.91, Cassandra ( datastax community edition 2.0.9 ) etc installed. Now when you login to cassandra, it will let you enter as superuser. You can now create new superuser and change existing superuser's password as well.

python cqlsh localhost -u cassandra -p cassandra 
Connected to Test Cluster at localhost:9160. 
[cqlsh 4.1.1 | Cassandra 2.0.9 | CQL spec 3.1.1 | Thrift protocol 19.39.0]

Use HELP for help.

cqlsh> create user abc with password 'xyz' superuser; 
cqlsh> alter user cassandra with password 'gaurav'; 
cqlsh> exit