DiegoSalazar/yubikey_database_authenticatable — pull request #1 by dmz006 (2014-12-18 05:07:22+00:00)
Title: Using Yubikey without password auth

When using yubikey OR a password needed to remove the resource = valid_password? and also change the resource.valid_password?(password) after validate(resource) since the password may be blank if using the Yubikey only for auth.