Create User in cassandra involve to change the parameter in cassandra.yaml and authentication mode.
# Authentication backend, implementing IAuthenticator; used to identify users
# Out of the box, Cassandra provides org.apache.cassandra.auth.{AllowAllAuthenticator,
# PasswordAuthenticator}.
# DSE also provides a Kerberos authenticator for external authentication.
#
# – AllowAllAuthenticator performs no checks – set it […]
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