Implementation of Signal module to create custom User model in Django Web Framework

models.py

from django.db import models
from django.contrib.auth.models import User
from django.dispatch import receiver
from django.db.models.signals import post_save

class Profile(models.Model):

    user = models.OneToOneField(
        User, related_name='profile', on_delete=models.CASCADE)

    nick = models.CharField(max_length=50)

    def __str__(self):
        return str(self.nick)

    @receiver(post_save, sender=User)
    def ensure_profile_exists(sender, **kwargs):
        user = kwargs.get('instance')
        Profile.objects.create(user=user, nick=user.username)

        # kwargs = {"instance" <user instance>, "created": <boolean> etc..}