It appears that when performing a docker login against the registry v2, no email address is sent to the token auth server. I believe this to be a bug.

This is a deviation from v1 and I believe it necessary to include the email address for account identification, password resets, etc.

Leaving the email address out is acceptable if the docker login process should no longer be allowed to create accounts, but I think would be bad user experience and according to the docker client documentation login should still register accounts.

/cc @stevvooe @jlhawn