new_contents: from django.core.management.base import BaseCommand
  
  from corehq.apps.users.models import WebUser
  
  from corehq.apps.users.models import Invitation, CouchUser
  
  
  class Command(BaseCommand):
      help = "Accepts an invite into a domain for an existing web user"
  
      def add_arguments(self, parser):
          parser.add_argument('username')
          parser.add_argument('domain')
  
      def handle(self, username, domain, **options):
          try:
              invitation = Invitation.objects.get(domain=domain, email=username, is_accepted=False)
          except:
              print("No invites found for %s in Project Space (%s)" % (username, domain))
              return
  
          user = CouchUser.get_by_username(username)
          if not user:
              print("No existing web users active for email address %s. This command can only activate existing web users" % username)
              return
  
          print("Accepting %s's invite to Project Space(%s)" % (username, domain))
          
          user.add_as_web_user(invitation.domain, role=invitation.role,
                                               location_id=invitation.supply_point, program_id=invitation.program)
          invitation.is_accepted = True
          invitation.save()
          print("Operation completed")
  
subject: Add a management command for accepting invites