Email the Zoom link to everyone who pays for your event

import base64
from email.message import EmailMessage
from google.oauth2.credentials import Credentials
from googleapiclient.discovery import build
from clickruntime import on_event, credentials, http, state

@on_event
def handle(event):
    sale = event.json or {}
    if state.get(event.event_id):
        return {"duplicate": True}
    zoom = {"Authorization": f"Bearer {credentials.connection('zoom', 'work')}"}
    meeting_id = state.get(f"meeting:{sale['event_name']}")
    if not meeting_id:
        meeting_id = http.post("https://api.zoom.us/v2/users/me/meetings", headers=zoom,
                               json={"topic": sale["event_name"], "type": 2, "start_time": sale["starts_at"], "duration": 90,
                                     "settings": {"approval_type": 0}}).json()["id"]
        state.set(f"meeting:{sale['event_name']}", meeting_id)
    reg = http.post(f"https://api.zoom.us/v2/meetings/{meeting_id}/registrants", headers=zoom,
                    json={"email": sale["email"], "first_name": sale.get("name", "Guest")}).json()
    msg = EmailMessage()
    msg["To"], msg["Subject"] = sale["email"], f"Your link for {sale['event_name']}"
    msg.set_content(f"Thanks for booking! Join here: {reg['join_url']}")
    gmail = build("gmail", "v1", credentials=Credentials(credentials.connection("google", "work")), cache_discovery=False)
    gmail.users().messages().send(userId="me", body={"raw": base64.urlsafe_b64encode(msg.as_bytes()).decode()}).execute()
    state.set(event.event_id, True)
    return {"meeting": meeting_id}