We can quickly create IAM group, IAM user,policy using CLI
aws iam create-group --group-names dev
aws iam create-user --user-name dev-1
aws iam add-user-to-group --user-name dev-1 --group-name dev
aws iam get-group --group-name dev
aws iam create-access-key --user-name dev-1
aws iam delete-access-key --user-name dev-1 --access-key-id AKIAIOSFODNN7EXAMPLE