new_contents: from django.core.management.base import BaseCommand
  from app.models import Tunnel
  
  
  class Command(BaseCommand):
      help = "Create superuser if missing (Non Interactive)."
  
      def add_arguments(self, parser):
          parser.add_argument('tunnel', nargs='*', type=int)
  
      def handle(self, *args, **kwargs):
          if kwargs['tunnel']:
              tunnels = Tunnel.objects.filter(id__in=kwargs['tunnel'])
          else:
              tunnels = Tunnel.objects.all()
          for tunnel in tunnels:
              self.stdout.write("Resetting tunnel %d..." % tunnel.id)
              tunnel.reset()
  
subject: Add reset tunnels management command