Correct s3 access snippets

[oliviermeslin]

Hi Onyxia team,

The S3 access snippets in R with R (aws.s3 and paws) were not working because listing buckets on S3 storages with many buckets does not seem to work for some reason. I propose a correction, along with a few comments.

[sonarqubecloud]

Quality Gate passed

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[oliviermeslin]

@garronej , @ddecrulle : I'm quite aware that username <- gsub("user-", "", Sys.getenv("KUBERNETES_NAMESPACE")) is not the proper way to retrieve the username (and it won't work anyway for project namespaces). But I really think it is useful to show how to list the content of a bucket (get_bucket(username, region = "")). Do you know how to do it in a less hacky way?

[fcomte]

Hello ,

We don't like those script in the opensource project.
We can only merge the removal of the bucket list function.
Sorry