Hammer CLI

If you need to do a lot of updates with hammer you can either specify a username/password for each command or use shell. It would be nice if hammer could also use certificate based authentication for a user (similar to pulp-admin) to allow commands to be run using the certificate instead of needing username and password. Certificates would also be more secure than specifying username and password in plaintext yml config files.

Ideally certificates would be used first so you could temporarily override a user in the config file.

for example, I could have a read only user in my config file but if I need to do updates I would use hammer login to get a certificate and use that certificate to authenticate as a user who has more access to systems.