Sorry, I do not know LastPass, so I cannot advise on this.
We noticed that WinSCP has S3 protocol support. However we need to access our S3 bucket website files with a LastPass login given to us by the LF Edge open source community.
This means we don't know the S3 master password and we need LastPass to handle it, either through the LastPass browser extension (which we have installed) or some other way that we don't know yet. Do you have a a step-by-step guide for this ? Thanks.