title: Can I use devise encrypted_password with custom authentication?
body: <p>I have a rails 4 app with devise authentication. I am rebuilding from scratch and would like to write my own authentication system but I have users stored in the database, whose password is stored as <code>encrypted_password</code>, which is what devise uses to store the hashed password. I understand that using <code>bcrypt</code> I should have a <code>password_digest</code>column. </p>
  
  <p>My question is twofold: will bcrypt be able to read what I have stored in my devise <code>encrypted_password</code> column and if so, can I simply rename that database column to <code>password_digest</code>or will this cause problems?</p>