hardcoded activeadmin stuff

app/controllers/devise/two_factor_authentication_controller.rb

@@ -1,4 +1,4 @@
-class Devise::TwoFactorAuthenticationController < DeviseController
+class Devise::TwoFactorAuthenticationController <  ActiveAdmin::Devise::SessionsController # DeviseController
   prepend_before_filter :authenticate_scope!
   before_filter :prepare_and_validate, :handle_two_factor_authentication
 
@@ -11,7 +11,7 @@ class Devise::TwoFactorAuthenticationController < DeviseController
     if md5.eql?(resource.second_factor_pass_code)
       warden.session(resource_name)[:need_two_factor_authentication] = false
       sign_in resource_name, resource, :bypass => true
-      redirect_to stored_location_for(resource_name) || :root
+      redirect_to stored_location_for(resource_name) || '/admin' #:root
       resource.update_attribute(:second_factor_attempts_count, 0)
     else
       resource.second_factor_attempts_count += 1

lib/two_factor_authentication/controllers/helpers.rb

@@ -11,11 +11,12 @@ module TwoFactorAuthentication
 
       def handle_two_factor_authentication
         unless devise_controller?
-          Devise.mappings.keys.flatten.any? do |scope|
+          scope = 'admin_user'
+          # Devise.mappings.keys.flatten.any? do |scope|
             if signed_in?(scope) and warden.session(scope)[:need_two_factor_authentication]
               handle_failed_second_factor(scope)
             end
-          end
+          # end
         end
       end
 
@@ -29,7 +30,8 @@ module TwoFactorAuthentication
       end
 
       def two_factor_authentication_path_for(resource_or_scope = nil)
-        scope = Devise::Mapping.find_scope!(resource_or_scope)
+        # scope = Devise::Mapping.find_scope!(resource_or_scope)
+        scope = 'admin_user'
         change_path = "#{scope}_two_factor_authentication_path"
         send(change_path)
       end