@receiver(post_save, sender=User)
def create_user_associate(sender, instance, created, **kwargs):
    if not instance.is_superuser:
        if created:
            Associate.objects.create(user=instance)
            instance.associate.save()
            # Asigno grupo asociados al usuario
            from django.contrib.auth.models import Group
            asoc = Group.objects.get(name='asociados')
            asoc.user_set.add(instance)
            instance.is_staff = True
            instance.save()

            # Agrego un AssociateDailyStatu con la primer situacion en tabla
            from msgs.models import AssociateDailyStatu, Situation
            AssociateDailyStatu.objects.create(
                associate=instance.associate,
                situation=Situation.objects.first())
        else:
            from vacations.models import VacationAvailable
            if instance.associate.date_of_entry and not \
                    VacationAvailable.objects.filter(
                        associate=instance.associate).exists():
                from vacations.helpers import VacationHelper
                VacationHelper.create_vacation_and_calculate_accumulated_days(
                    instance.associate)