'get-login' is no longer supported and it's not clear how to authenticate

[javadba]

In the instructions Step #3 not only does not work as given

$ aws ecr get-login

The "replacement" get-login-password does not contain the "URI" as described in Step#4

Tag your images and push them to the repositories. (You must put it your own repository URI from the repositoryUri value from step #3)

So I'm uncertain how to proceed.

[ar-ds]

Yes! How can we still utilize IAM roles to authenticate to a reserved proxy ECR utilizing the provided command?

aws ecr get-login-password --region region | docker login --username AWS --password-stdin registry.myregistry.com