title: How to find out S3 Bucket last accessed time?
body: <p>I have a use-case where I need to find out last accessed time of the S3 bucket, but I am not able to find a way to do so. Though, we can get <em>LastModifiedTime</em> or <em>LastUpdatedTime</em> for the bucket, but I couldn't find any AWS API, which can give me the last accessed time for the AWS S3 Bucket. One way to do this is to parse through all the objects inside the buckets, but that's a very expensive operation to do, which I can't afford. 
  Can somebody help me in getting the <em>LastAccessedTime</em> for the AWS S3 Bucket? I am using Python with boto3.</p>