perf: During MFA authentication, if the current code has been used and successfully authenticated, it cannot be used again for authentication

apps/authentication/api/mfa.py

@@ -3,7 +3,7 @@
 from django.shortcuts import get_object_or_404
 from django.utils.translation import gettext as _
 from rest_framework import exceptions
-from rest_framework.generics import CreateAPIView, RetrieveAPIView
+from rest_framework.generics import CreateAPIView
 from rest_framework.permissions import AllowAny
 from rest_framework.response import Response
 from rest_framework.serializers import ValidationError
@@ -23,8 +23,6 @@ __all__ = [
 ]
 
 
-
-
 # MFASelectAPi 原来的名字
 class MFASendCodeApi(AuthMixin, CreateAPIView):
     """