yourapp/models.py где хранится модель профиля
from django.db.models.signals import post_save
from django.dispatch import receiver
@receiver(post_save, sender=User)
def save_or_create_profile(sender, instance, created, **kwargs):
if created:
Profile.objects.create(user=instance)
else:
try:
instance.profile.save()
except ObjectDoesNotExist:
Profile.objects.create(user=instance)
