CODE EXAMPLE FOR PYTHON

django muti user for 3 users

from django.contrib.auth.models import User

class Organization(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE, related_name="organization")
    name = models.CharField(max_length=50, blank=True, null=True)

class Supervisor(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE, related_name="supervisor")
    name = models.CharField(max_length=50, blank=True, null=True)
    organization = models.ForeignKey(Organization, on_delete=models.CASCADE, related_name="supervisors")
    
class CustomUser(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE, related_name="custom_user")
    name = models.CharField(max_length=50, blank=True, null=True)
    supervisor = models.ForeignKey(Supervisor, on_delete=models.CASCADE, related_name="custom_users", blank=True, null=True)