add active record generator

lib/generators/active_record/two_factor_authentication_generator.rb

@@ -0,0 +1,14 @@
+require 'rails/generators/active_record'
+
+module ActiveRecord
+  module Generators
+    class TwoFactorAuthenticationGenerator < ActiveRecord::Generators::Base
+      source_root File.expand_path("../templates", __FILE__)
+
+      def copy_two_factor_authentication_migration
+        migration_template "migration.rb", "db/migrate/two_factor_authentication_add_to_#{table_name}"
+      end
+
+    end
+  end
+end