How do I pass username:password in front of domain in url, flask

I am currently in the process of building an application, and I need to be able to make use of the fact that if you have a url like this:

https://username:password@domain.tld/page

you can use that to login on the page, however when trying to figure out where in my request that data gets passed to flask when making a new route, I am failing. I know that I can do this in other ways, however this option has some advantages for me.

I am very aware that there are serious security implications with this, and that using this for logging in is a very bad idea, and I am not going to use it to handle user logins, but rather other data.

If anyone can point me in a direction of how to get this information from a the request that would be lovely, thanks again.

The username and password are available on the authorization attribute of the request object. Given code like this:

from flask import Flask, request

app = Flask(__name__)

@app.route('/')
def index():
    if request.authorization:
        auth = request.authorization
        return auth.parameters
    else:
        return 'Not authenticated'

A request like:

curl http://alice:example@localhost:5000/

Will result in:

{"password":"example","username":"alice"}

While a request without authorization, like this:

curl localhost:5000

Will result in:

Not authenticated