# Pastebin O0Ju0mGg
Hi, I am testing the S3 ACL feature with Swift. I have a use case, where I have a SWIFT project ID, and multiple users e.g. userA and userB are associated with this project ID. Now userA creates a bucket using S3 API, then I noticed until he grants permission to userB specifically, userB can’t read and write that bucket. In the case of AWS due to the canonical ID concept, both users will have access to that bucket irrespective of who created it.I am not sure, but, can S3 API middleware handle such cases, where if a user should be allowed to read/write a bucket (the user may not be the owner) into the project until user’s access is denied for that resource?