new_contents: from django.contrib.auth.models import User
  from django.core.management.base import BaseCommand
  
  from userena.models import UserenaSignup
  
  
  class Command(BaseCommand):
      help = "Notify users to update."
  
      def handle(self, *args, **options):
          for user in User.objects.filter(is_active=False, userena_signup__isnull=False):
              new_key = UserenaSignup.objects.reissue_activation(user.userena_signup.activation_key)
              self.stdout.write(u'Email with {}'.format(user.email))
  
subject: Add reissue_activation_keys