The builder should fail fast when no credentials are provided for Astra clusters
Description
Currently the error message is not obvious at all for users who forget to call Builder.WithCredentials after or before Builder.WithSecureConnectionBundle.
Unhandled exception. Cassandra.NoHostAvailableException: All hosts tried for query failed (tried REDACTED: AuthenticationException 'Authentication error on host REDACTED: Host REDACTED requires authentication, but no authenticator found in Cluster configuration')
Major
Currently the error message is not obvious at all for users who forget to call
Builder.WithCredentialsafter or beforeBuilder.WithSecureConnectionBundle.Unhandled exception. Cassandra.NoHostAvailableException: All hosts tried for query failed (tried REDACTED: AuthenticationException 'Authentication error on host REDACTED: Host REDACTED requires authentication, but no authenticator found in Cluster configuration')