Set password authentication cassandra

By default, Cassandra uses the cassandra username and the password cassandra. For security reasons, especially in production environments, you must change this password immediately after setup.

To do this, we'll use CQL, the Cassandra Query Language, which is similar in purpose to SQL.

Connect to Cassandra using default credentials.
```
cqlsh -u cassandra -p cassandra
```
Cqlsh may not be available on RPM-based systems

On some RPM-based distributions, the cqlsh client isn't included with the cassandra package. If running cqlsh gives an error, download the official Apache Cassandra tarball that matches your server version and extract it. Then run the bundled client: ./bin/cqlsh -u cassandra -p cassandra.

If the connection is successful, you'll see output similar to:
```
Connected to xxx at xx.xx.xx.xx:xxxx
[cqlsh 6.1.0 | Cassandra 4.1.9 | CQL spec 3.4.6 | Native protocol v5]
```
Change the default password.
```
ALTER USER cassandra WITH PASSWORD '<authentication_cassandra_password>';
```
Replace <authentication_cassandra_password> with the password you intend to use for the cassandra superuser account.
Disconnect from the session.

Press Ctrl+D to exit the cqlsh shell.
Reconnect using your new password.
```
cqlsh -u cassandra
```