new_contents: from django.core.management.base import BaseCommand
  
  from waldur_mastermind.support import backend as support_backend
  
  from ... import models
  
  
  class Command(BaseCommand):
      help = ("Backend data update if a server was switched.")
  
      def handle(self, *args, **options):
          models.RequestType.objects.all().delete()
          backend = support_backend.get_active_backend()
          backend.pull_request_types()
  
          for support_customer in models.SupportCustomer.objects.all():
              exists_user = backend.manager.search_users(support_customer.user.email)
  
              if exists_user:
                  backend_user = exists_user[0]
              else:
                  backend_user = backend.create_user(support_customer.user)
  
              support_customer.backend_id = backend_user.key
              support_customer.save()
  
subject: Implement management command to switch backend server in JIRA Service Desk plugin.