title: Migrate django users to rails
body: <p>I currently have a system with django which I need to migrate to rails. I am using Devise for authorization in rails. The old django system has it's own set of users which I need to migrate to rails. The thing that I am concerned with, is the password of the users. It is encrypted using sha1 algorithm. So, how I can modify devise such that it is compatible with the old user's password as well.</p>