Wrong example code in docs

[Jaime02]

Hello, I was reading this part of the docs:
https://flask-login.readthedocs.io/en/latest/#disabling-session-cookie-for-apis

from flask import g
from flask.sessions import SecureCookieSessionInterface
from flask_login import user_loaded_from_request

@user_loaded_from_request.connect
def user_loaded_from_request(app, user=None):
    g.login_via_request = True


class CustomSessionInterface(SecureCookieSessionInterface):
    """Prevent creating session from API requests."""
    def save_session(self, *args, **kwargs):
        if g.get('login_via_request'):
            return
        return super(CustomSessionInterface, self).save_session(*args,
                                                                **kwargs)

app.session_interface = CustomSessionInterface()

@user_loaded_from_request.connect
def user_loaded_from_request(self, user=None):
    g.login_via_request = True

The function user_loaded_from_request makes no sense, it is defined twice but the second time has self as argument instead of app. I don´t know what should be correct because the docs does not provide more information and context about the code.