How are people using

DockerRegistryCredentials

to login with ECR? On the command line I would pass "AWS" as the username and the token from

aws ecr get-login-password

to STDIN, but that's not really an option here. I see a few PRs/issues related to it (notably docker-py, prefect), but no examples for the Block.

docker-py

's login doesn't have any native code for authenticating with AWS, and the issue I cited suggests people write their own authentication.

prefect-docker

just calls the client's login method.

did you ever figure this out?

No, went with the other way and just specify the ECR image in my prefect.yaml

I was able to do it using python_on_whales package