devise_auditable is a plugin for Devise that adds a audit log support to Devise.
Add devise_auditable to your Gemfile
gem 'devise_auditable'
Run the installer
rails g devise_auditable User
Add the auditable key to your devise user model
class User < ActiveRecord::Base
devise :database_authenticatable, ..... , :auditable
end
Optionally, you can add a has_many relationship to your devise
model.