[Python] How can I implement post_save signals in Django?

I am currently building a geolocation app, and I'm somewhat stuck somewhere. I'm trying to implement a post_save Django signals in this code, but I can't figure out what exactly I need to do. any help here would be appreciate. Here's my code:

from ipaddress import ip_address


from django.contrib.auth import get_user_model

from celery import shared_task from apps.users.abstractapi import AbstractAPI

User = get_user_model()

@shared_task def enrich_user(user_pk): user = User.objects.get(pk=user_pk) api = AbstractAPI()

location_details = api.get_geolocation_details(ip_address=user.ip_address)
if location_details is not None:
user.country = location_details.get("country")
user.country_code = location_details.get("country_code")
user.country_geoname_id = location_details.details.get("country_geoname_id")
user.longitude = location_details.get("longitude")
user.latitude = location_details.get("latitude")
user.save(update_fields=("country", "country_code", "country_geoname_id", "longitude", "latitude"))

holiday_details = api.get_holiday_details(
country_code=user.country_code,
day=user.date_joined.day,
month=user.date_joined.month,
year=user.date_joined.year,
)

if holiday_details is not None and any(holiday_details):
user.joined_on_holiday = True
user.save(update_fields=("joined_on_holiday",))

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