Xuanwo commented on code in PR #5883:
URL: https://github.com/apache/arrow-rs/pull/5883#discussion_r1638538556


##########
object_store/src/aws/credential.rs:
##########
@@ -424,6 +424,7 @@ fn canonicalize_headers(header_map: &HeaderMap) -> (String, 
String) {
 /// 
<https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/configuring-instance-metadata-service.html>
 #[derive(Debug)]
 pub struct InstanceCredentialProvider {
+    #[allow(dead_code)]

Review Comment:
   Would you like to create an issue for this? I feel like we've overlooked 
something here that prevents `cache` from ever being used. I'm willing to get 
it fixed.



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