Send emails using gmail app passwords and python smtp library

gmail.py

import os
import smtplib
import logging
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText


class GmailAPI():
    '''
    Send email using email, app key from environment variables
    Usage:
    g = GmailAPI()
    g.send_email(to, subject, body)
    '''

    def __init__(self):
        self.user = os.getenv('GMAIL_USER')
        self.key = os.getenv('GMAIL_APP_KEY')

    def create_message(self, sender, to, subject, body):
        msg = MIMEMultipart('alternative')
        msg['Subject'] = subject
        msg['From'] = sender
        msg['To'] = to
        msg.attach(MIMEText(body, 'html'))
        return msg

    def send_email(self, to, subject, body):
        message = self.create_message(self.user, to, subject, body)
        server = smtplib.SMTP_SSL('smtp.gmail.com', 465)
        server.ehlo()
        server.login(self.user, self.key)
        server.sendmail(self.user, to, message.as_string())
        server.close()