snazy commented on code in PR #3591:
URL: https://github.com/apache/polaris/pull/3591#discussion_r2740704449


##########
getting-started/ozone/README.md:
##########
@@ -48,6 +48,7 @@ bin/spark-sql \
     --conf spark.sql.catalog.polaris.token-refresh-enabled=false \
     --conf spark.sql.catalog.polaris.warehouse=quickstart_catalog \
     --conf spark.sql.catalog.polaris.scope=PRINCIPAL_ROLE:ALL \
+    --conf spark.sql.catalog.polaris.header.X-Iceberg-Access-Delegation="" \

Review Comment:
   I'd prefer to have the guides-testing in, hence this PR.
   Manual testing (copy paste from the Markdown) has different (timing) 
behavior than running the steps "as fast as possible" from the CI scripts.
   
   The `Credential vending was requested for table [...], but no credentials 
are available` message is coming from Polaris, so I think this is an issue in 
the code base as it exists `main`.
   
   Related/orthogonal: I'm not sure that using static credentials passed to a 
client (Spark SQL shell in this case) is a good option to demonstrate to users. 
What's missing here is S3 remote request signing.



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