Console Output

$ docker login -u dockerbuildbot -p ******** https://index.docker.io/v1/
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
WARNING! Your password will be stored unencrypted in /home/ubuntu/workspace/docker-ce-packaging_PR-780@tmp/387314fe-f320-4d5c-9463-53c1cd9e147d/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store

Login Succeeded