Django提供admin后台，便于统一管理用户、权限和权限组，超级用户初始化方法
初始化命令行：
python manage.py createsuperuser
根据提示设置用户名、邮箱和密码：
D:\pyCharm\BBS>python manage.py createsuperuser
Username: admin
Email address: 294168604@qq.com
Password:
Password (again):
The password is too similar to the username.
This password is too common.
Bypass password validation and create user anyway? [y/N]: y
Superuser created successfully.