yeah... you've probably heard of an " AWS Builder ID " but you're not quite sure what it means. I'm going to break it down nicely so you have a good idea of what it is. You may or may not have an AWS Builder ID, if you're reading this on builder.aws.com you do 😉, but today is your chance to create one, stick around til the end. tl;dr : One personal login (your email) for AWS tools. In the new AWS experience , it's also your AWS sign-in and billing identity. No root user or IAM user ...