ORA-62709
OSAK SASL/SSL credential name is NULL.
Cause
An attempt to configure an Oracle SQL Access to Kafka (OSAK) cluster failed because the SASL/SSL credential name was NULL.
Action
The password for SASL/SSL must be stored as a database credential using the DBMS_CREDENTIAL.CREATE_CREDENTIAL() procedure. Supply the database credential name for the credential_name parameter in the DBMS_KAFKA_ADM.REGISTER_CLUSTER procedure call.