app/models/user.rb

@@ -63,6 +63,10 @@ class User < ApplicationRecord
     end
   end
 
+  def send_devise_notification(notification, *args)
+    devise_mailer.send(notification, self, *args).deliver_later
+  end
+
   def reset_password(new_password, new_password_confirmation)
     self.password = new_password
     self.password_confirmation = new_password_confirmation

config/sidekiq.yml

@@ -1,3 +1,4 @@
 :concurrency: 2
 :queues:
   - default
+  - mailers