Send thank-you emails from the right mailbox for each brand

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

api = lambda name, version: build(name, version, credentials=Credentials(credentials.connection("google", "work")), cache_discovery=False)

def send_gmail(to, subject, text):
    raw = base64.urlsafe_b64encode(f"To: {to}\r\nSubject: {subject}\r\nContent-Type: text/plain; charset=utf-8\r\n\r\n{text}".encode()).decode()
    api("gmail", "v1").users().messages().send(userId="me", body={"raw": raw}).execute()

def graph(method, path, **kw):
    r = http.request(method, "https://graph.microsoft.com/v1.0" + path, headers={"Authorization": f"Bearer {credentials.connection('microsoft', 'work')}"}, **kw)
    return r.raise_for_status() or (r.json() if r.content else None)

def send_mail(to, subject, text):
    graph("POST", "/me/sendMail", json={"message": {"subject": subject, "body": {"contentType": "Text", "content": text},
          "toRecipients": [{"emailAddress": {"address": a}} for a in to.split(",")]}})

@on_event
def handle(event):
    sale = event.json or {}
    if state.get(f"sale:{event.event_id}"):
        return {"duplicate": True}
    first = (sale.get("name") or "there").split()[0]
    if sale.get("store") == "northwind-candles":
        send_gmail(sale["email"], "Thank you from Northwind Candles", f"Hi {first},\n\nThank you for your order. We hope you love it!\n\nNorthwind Candles")
        mailbox = "gmail"
    else:
        send_mail(sale["email"], "Thank you from Acme Workshop", f"Hi {first},\n\nThanks for your order. Reply here with any questions.\n\nAcme Workshop")
        mailbox = "outlook"
    state.set(f"sale:{event.event_id}", mailbox)
    return {"sent_from": mailbox}