如何使用两个不同的配置文件扩展Django用户模型？

from django.conf import settings

# 其他基本配置...

from .settings import *

AUTH_USER_MODEL = 'myapp.MyCustomUser'

from .settings import *

AUTH_USER_MODEL = 'myapp.AnotherCustomUser'

import os
import sys

if os.environ.get('DJANGO_ENV') == 'production':
    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'myproject.settings_prod')
else:
    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'myproject.settings_dev')

try:
    from django.core.management import execute_from_command_line
except ImportError as exc:
    raise ImportError(
        "Couldn't import Django. Are you sure it's installed and "
        "available on your PYTHONPATH environment variable? Did you "
        "forget to activate a virtual environment?"
    ) from exc

execute_from_command_line(sys.argv)