We are on version 6.3. Trying to add a S3 repository to my running elasticsearch cluster. I am using following to add access/secret key for my client to elasticsearch-keystore
bin/elasticsearch-keystore add s3.client.myclient.access_key
bin/elasticsearch-keystore add s3.client.myclient.secret_key
Since 6.3 does not support POST _nodes/reload_secure_settings to reload these secure settings, what are my options to make running elasticsearch cluster recognize these settings?