Add new leads to HubSpot without duplicates

from datetime import datetime, timezone
from clickruntime import on_event, credentials, http

API = "https://api.hubapi.com/crm/v3/objects"

@on_event
def handle(event):
    booking = event.json or {}
    headers = {"Authorization": f"Bearer {credentials.connection('hubspot', 'work')}"}
    found = http.post(f"{API}/contacts/search", headers=headers, json={"filterGroups": [{"filters": [
        {"propertyName": "email", "operator": "EQ", "value": booking["email"]}]}]}).json()["results"]
    props = {"email": booking["email"], "firstname": booking.get("first_name", ""),
             "lastname": booking.get("last_name", ""), "company": booking.get("company", "")}
    if found:
        contact_id = found[0]["id"]
        http.patch(f"{API}/contacts/{contact_id}", headers=headers, json={"properties": props}).raise_for_status()
    else:
        contact_id = http.post(f"{API}/contacts", headers=headers, json={"properties": props}).json()["id"]
    http.post(f"{API}/notes", headers=headers, json={
        "properties": {"hs_note_body": f"Meeting booked for {booking.get('start_time')}",
                       "hs_timestamp": datetime.now(timezone.utc).isoformat()},
        "associations": [{"to": {"id": contact_id}, "types": [
            {"associationCategory": "HUBSPOT_DEFINED", "associationTypeId": 202}]}]}).raise_for_status()
    return {"contact": contact_id, "created": not found}