class CustomManager(UserManager):
use_in_migrations = True

def _create_user(self, username, email, password, age, **extra_fields):
    """
    Creates and saves a User with the given username, email and password.
    """
    if not username:
        raise ValueError('The given username must be set')
    email = self.normalize_email(email)
    username = self.model.normalize_username(username)
    user = self.model(username=username, email=email, **extra_fields)
    user.set_password(password)
    user.save(using=self._db)
    return user

def create_user(self, username, age, email=None, password=None, **extra_fields):
    extra_fields.setdefault('is_staff', False)
    extra_fields.setdefault('is_superuser', False)
    return self._create_user(username,age, email, password, **extra_fields)

class Profile(AbstractUser):
#user = models.OneToOneField(User, on_delete=models.CASCADE)
objects = CustomManager()
Family = models.CharField(max_length=200)
City = models.CharField(max_length=200)
GENDER_CHOICES = (
    ('M', 'Male'),
    ('F', 'Female'),
)
sex = models.CharField(max_length=1, choices=GENDER_CHOICES) #models.BooleanField(default=True)
Age = models.SmallIntegerField(null=True)
photo = models.ImageField(upload_to="images")

profile = Profile.objects.create_user(i_name,e_mail,pswd,age)

user = self.model(username=username, email=email, **extra_fields)