old_contents: from django.core.management.base import BaseCommand, CommandError
  
  from backend.models import Account
  from backend.tasks import get_all_contributions
  
  class Command(BaseCommand):
      help = 'Closes the specified poll for voting'
  
      def add_arguments(self, parser):
          parser.add_argument('--username', dest='username', default=None)
  
      def handle(self, *args, **options):
          if options.get('username'):
              username = options.get('username')
              try:
                  account = Account.objects.get(username=username)
              except Account.DoesNotExist:
                  raise CommandError('Account "%s" does not exist' % username)
  
              get_all_contributions(account)
              self.stdout.write(
                      'Successfully fetched all user  "%s" contributions' % username)
          else:
              get_all_contributions()
              self.stdout.write('Successfully fetched all users contributions')
  
new_contents: from django.core.management.base import BaseCommand, CommandError
  
  from backend.models.account import Account
  from backend.tasks import get_all_contributions
  
  class Command(BaseCommand):
      help = 'Closes the specified poll for voting'
  
      def add_arguments(self, parser):
          parser.add_argument('--username', dest='username', default=None)
  
      def handle(self, *args, **options):
          if options.get('username'):
              username = options.get('username')
              try:
                  account = Account.objects.get(username=username)
              except Account.DoesNotExist:
                  raise CommandError('Account "%s" does not exist' % username)
  
              get_all_contributions(account)
              self.stdout.write(
                      'Successfully fetched all user  "%s" contributions' % username)
          else:
              get_all_contributions()
              self.stdout.write('Successfully fetched all users contributions')
  
subject: Fix Account import in management command