I have found this tool super useful, thank you for making it! Due to the problem described I first thought that the program did not work at all, as I could not open any of my buckets. This is why I think it's worth fixing.

The list of buckets show all buckets in the aws account for all regions. This makes it seem like they can all be accessed. However when trying to open a bucket that resides in a different region than specified (ap-northeast-1 by default), it fails with the error ERROR: Failed to load objects. It would be really useful to show a invalid bucket region or something in this case to avoid confusion.

If you want I can make a pull request on this :) I have zero experience with rust so it would be interesting to give it a shot.