Potential new security feature

[gaurimadhok]

We could add a feature to docker login to support accepting an access token instead of a password or look into two-factor authentication to improve security. Here are some links to learn more about these options and explore them further. For access tokens - https://docs.docker.com/docker-hub/access-tokens/. For two-factor - https://docs.docker.com/docker-hub/2fa/.