Understanding the Identity and Access Management (IAM) Service

AWS IAM is a service provided by AWS that helps you control who can access your AWS resources and what they can do with them. It allows you to manage user accounts, set up permissions, and ensure the security of your AWS infrastructure.

Suppose you want to create a new user for your team member named Alice. You can do this quickly and easily with the AWS CLI using the following command:

aws iam create-user --user-name Alice

After your user Alice has been created, you would need to assign her permissions based on her job role and function. In this case, you could give Alice access to the Amazon S3 service, which she could use to put and retrieve files:

aws iam attach-user-policy --user-name Alice --policy-arn arn:aws:iam::aws:policy/AmazonS3FullAccess

After attaching the managed S3 policy to user Alice, you realize it would be better to make sure that Alice only has permission to access the specific buckets...