• Currently, only Avro and Protobuf are supported for schema registry in Kafka. JSONSchema is not supported yet.
• To provide authentication credentials for the schema registry when reading from Kafka, you can include the schema.registry.username and schema.registry.password properties in the Kafka source creation query.
• If you need to work with JSONSchema, you may need to wait for future updates that include support for JSONSchema in the schema registry.
• Here is an example of how you can include the authentication credentials in the Kafka source creation query:

CREATE SOURCE uje_s
WITH (
   connector='kafka',
   topic='...',
   properties.bootstrap.server='...',
   scan.startup.mode='earliest',
   properties.sasl.mechanism='PLAIN',
   properties.security.protocol='SASL_SSL',
   properties.sasl.username='...',
   properties.sasl.password='...',
   schema.registry.username='...',
   schema.registry.password='...'
) FORMAT PLAIN ENCODE JSON (
   confluent_schema_registry='...'
);