app/models/user.rb
class User < ActiveRecord::Base
attr_accessible :email, :password, :password_confirmation if Rails::VERSION::MAJOR < 4
# Connects this user object to Blacklights Bookmarks.
include Blacklight::User
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
end