# File lib/authlogic/acts_as_authentic/single_access_token.rb, line 31
        def self.included(klass)
          return if !klass.column_names.include?("single_access_token")

          klass.class_eval do
            include InstanceMethods
            validates_uniqueness_of :single_access_token, :if => :single_access_token_changed?
            before_validation :reset_single_access_token, :if => :reset_single_access_token?
            if respond_to?(:after_password_set)
              after_password_set(:reset_single_access_token, :if => :change_single_access_token_with_password?)
            end
          end
        end