add confirmation columns

config/initializers/devise.rb

@@ -31,6 +31,7 @@ end
 #
 # Use this hook to configure devise mailer, warden hooks and so forth.
 # Many of these configuration options can be set straight in your model.
+# rubocop:disable Metrics/BlockLength
 Devise.setup do |config|
   config.warden do |manager|
     manager.default_strategies(scope: :user).unshift(:two_factor_authenticatable)
@@ -166,7 +167,7 @@ Devise.setup do |config|
   # without confirming their account.
   # Default is 0.days, meaning the user cannot access the website without
   # confirming their account.
-  # config.allow_unconfirmed_access_for = 2.days
+  config.allow_unconfirmed_access_for = nil
 
   # A period that the user is allowed to confirm their account before their
   # token becomes invalid. For example, if set to 3.days, the user can confirm
@@ -332,3 +333,4 @@ Devise.setup do |config|
 
   ActiveSupport.run_load_hooks(:devise_config, config)
 end
+# rubocop:enable Metrics/BlockLength