old_contents: from django.db import models
  from django.contrib.auth.models import User
  
  
  class Player(models.Model):
      user = models.OneToOneField(User)
  
  
  class Avatar(models.Model):
      player = models.ForeignKey(User)
      code = models.TextField()
new_contents: from django.db import models
  from django.contrib.auth.models import User
  
  
  class Player(models.Model):
      user = models.OneToOneField(User)
      code = models.TextField()
  
  
  class Avatar(models.Model):
      player = models.ForeignKey(User)
      
subject: Move code into player (if only for now)