old_contents: from django.contrib.auth.models import User
  from django.db import models
  from django.db.models.signals import post_save
  from django.dispatch import receiver
  
  
  class UserProfile(models.Model):
      user = models.OneToOneField(User)
      bio = models.TextField(max_length=256, blank=True)
      solvedChallenges=models.CharField(solved=[],max_length=256)
      solvedQuestions=models.CharField(solved=[],max_length=256)
      score = models.IntegerField(default=0)
  
  
      def __str__(self):
          return str(self.user.username)
  
  
  # Method to link the User and UserProfile models
  @receiver(post_save, sender=User)
  def create_user_profile(sender, instance, created, **kwargs):
      if created:
          UserProfile.objects.create(user=instance)
      instance.userprofile.save()
  
new_contents: from django.contrib.auth.models import User
  from django.db import models
  from django.db.models.signals import post_save
  from django.dispatch import receiver
  
  from challenges.models import Challenge
  from questionnaire.models import Question
  
  
  class UserProfile(models.Model):
      user = models.OneToOneField(User)
      bio = models.TextField(max_length=256, blank=True)
  
      solved_challenges = models.ManyToManyField(Challenge)
      solved_questions = models.ManyToManyField(Question)
      score = models.IntegerField(default=0, editable=False)
  
      def __str__(self):
          return str(self.user.username)
  
      def calculate_score(self):
          score = 0
          for chal in self.solved_challenges.all():
              score = score + chal.score
          for ques in self.solved_questions.all():
              score = score + ques.score
  
          return score
  
      def save(self, *args, **kwargs):
          '''On save, update score '''
  
          self.score = self.calculate_score()
          return super(UserProfile, self).save(*args, **kwargs)
  
  
  # Method to link the User and UserProfile models
  @receiver(post_save, sender=User)
  def create_user_profile(sender, instance, created, **kwargs):
      if created:
          UserProfile.objects.create(user=instance)
      instance.userprofile.save()
  
subject: Update accounts model with scoring system