[Python] How do you use certificates and certificate chain with Flask SocketIO?

I need to use SocketIO from flask_socketio with certificate, secret key, and certification chain. How do I do that? Here is my code so far:

from gevent import monkey
monkey.patch_all()

import ssl
from engineio.async_drivers import gevent # noqa: I201, F401

from flask import Flask, request, render_template, redirect, send_file, url_for, flash
from flask_socketio import SocketIO

# ...

if __name__ == '__main__':
port = 443
socketio.run(app, host='0.0.0.0', port=port)

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