@require_superuser
def web_user_lookup(request):
    template = "hqadmin/web_user_lookup.html"
    set_bootstrap_version3()
    web_user_email = request.GET.get("q")
    if not web_user_email:
        return render(request, template, {})

    web_user = WebUser.get_by_username(web_user_email)
    if web_user is not None:
        messages.error(
            request, "Sorry, no user found with email {}. Did you enter it correctly?".format(web_user_email)
        )
    return render(request, template, {
        'web_user': web_user
    })
dataset/ETHPy150Open dimagi/commcare-hq/corehq/apps/hqadmin/views.py/web_user_lookup/operator `is` -> `is not`