def get(self, request):
        token = request.GET.get('token')
        try:
            payload = jwt.decode(token, settings.SECRET_KEY, algorithms=['HS256'])
            user = User.objects.get(pk=payload['user_id'])
            user.is_active = True
            user.save()

            return Response({
                'email': 'Successfully activated!'
            }, status=status.HTTP_200_OK)

        except jwt.ExpiredSignatureError:
            return Response({'error': 'Activation link has expired'}, status=status.HTTP_400_BAD_REQUEST)

        except jwt.DecodeError:
            return Response({'error': 'Invalid token'}, status=