使用python-social-auth和自定义用户模型和UserManager创建django用户的问题

# models.py
from django.db import models
from django.contrib.auth.models import AbstractBaseUser, PermissionsMixin, BaseUserManager

class CustomUserManager(BaseUserManager):
    def create_user(self, email, password=None, **extra_fields):
        if not email:
            raise ValueError('The Email field must be set')
        email = self.normalize_email(email)
        user = self.model(email=email, **extra_fields)
        user.set_password(password)
        user.save(using=self._db)
        return user

    def create_superuser(self, email, password=None, **extra_fields):
        extra_fields.setdefault('is_staff', True)
        extra_fields.setdefault('is_superuser', True)

        return self.create_user(email, password, **extra_fields)

class CustomUser(AbstractBaseUser, PermissionsMixin):
    email = models.EmailField(unique=True)
    first_name = models.CharField(max_length=30, blank=True)
    last_name = models.CharField(max_length=30, blank=True)
    is_active = models.BooleanField(default=True)
    is_staff = models.BooleanField(default=False)

    objects = CustomUserManager()

    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = []

    def __str__(self):
        return self.email

# signals.py
from django.db.models.signals import post_save
from django.dispatch import receiver
from social_django.models import UserSocialAuth

@receiver(post_save, sender=UserSocialAuth)
def save_user_profile(sender, instance, **kwargs):
    if instance.user_id:
        user = instance.user
        user.first_name = instance.extra_data.get('first_name', '')
        user.last_name = instance.extra_data.get('last_name', '')
        user.save()

# apps.py
from django.apps import AppConfig

class YourAppConfig(AppConfig):
    name = 'yourapp'

    def ready(self):
        import yourapp.signals

# settings.py
AUTHENTICATION_BACKENDS = (
    'social_core.backends.facebook.FacebookOAuth2',
    'social_core.backends.twitter.TwitterOAuth',
    'django.contrib.auth.backends.ModelBackend',
)

SOCIAL_AUTH_USER_MODEL = 'yourapp.CustomUser'