When creating an DataStax Astra DB database, the default user is created with the required permissions to manage the created keyspace.This default user is not equivalent to the cassandra superuser.However, the default user is granted the following permissions in the keyspace created on the database:
Create, select, modify, drop, and describe database objects, including keyspaces, tables, and roles
Grant the same or lesser permissions to additional user roles
Create and drop additional user roles
You must be the default user to create additional users within the selected keyspace.