models.py

from django.contrib.auth.models import User
from django.db import models


class UserProfile(models.Model):
    user = models.OneToOneField(User)
    is_organization = models.BooleanField()
    is_administrator = models.BooleanField()

    def save(self):
        super(UserProfile, self).save()
        self.user.username = self.user.email

    def __str__(self):
        return self.email