Sometimes you encountered a error in scylladb - "You have to be logged in and not anonymous to perform this request"
cassandra@cqlsh> GRANT SELECT ON myKeybase.test TO testuser;
Unauthorized: Error from server: code=2100 [Unauthorized] message="You have to be logged in and not anonymous to perform this request"
cassandra@cqlsh>
1 Find and open 'cassandra.yaml' file on your computer.
2 Find and delete 'authenticator: AllowAllAuthenticator' in the file.
3 Replace it with 'authenticator: PasswordAuthenticator'
4 Also, add this line : 'authorizer: CassandraAuthorizer '
Restart Cassandra.