如何在认证模式中加密django用户名字段？

from django.contrib.auth.models import AbstractUser
from django.db import models
from django.contrib.auth.hashers import make_password, check_password

class CustomUser(AbstractUser):
    # 添加自定义字段
    encrypted_username = models.CharField(max_length=255, unique=True)

    def save(self, *args, **kwargs):
        # 加密用户名字段
        self.encrypted_username = make_password(self.username)
        super().save(*args, **kwargs)

from django.contrib.auth import get_user_model

User = get_user_model()

def authenticate(request, username=None, password=None, **kwargs):
    try:
        user = User.objects.get(encrypted_username=make_password(username))
        if user.check_password(password):
            return user
    except User.DoesNotExist:
        return None