If you have s3cmd installed, read the --help:
--configure Invoke interactive (re)configuration tool.
Optionally use as '--configure s3://come-bucket' to test access to a specific bucket instead of attempting to list them all.
https://github.com/s3tools/s3cmd/blob/master/s3cmd#L2048
The version I have with the typo is 1.5.0-alpha1
Pretty funny typo ;)