text: import pyotp
  
  from rest_framework.serializers import (
      ModelSerializer,
      SerializerMethodField,
  )
  
  from .models import User
  
  
  class UserSerializer(ModelSerializer):
  
      class Meta:
          model = User
          fields = (
              "id",
              "username",
              "first_name",
              "last_name",
              "email",
              "is_active",
              "last_login",
          )
  
  class TOTPSetupSerializer(ModelSerializer):
  
      qr_url = SerializerMethodField()
  
      class Meta:
          model = User
          fields = (
              "username",
              "totp_key",
              "qr_url",
          )
  
      def get_qr_url(self, obj):
          return pyotp.totp.TOTP(obj.totp_key).provisioning_uri(obj.username, issuer_name="Tactical RMM")
  