Authentication Flow failing due to host, port parsing

[christopherhastings]

Describe the bug
In the Authentication flow, when trying to set up URL parsing based on a split ":", it cannot accommodate a port, which is necessary for self-authorization. I believe the get_host_port function is having difficulties parsing. 000

Your code

from six.moves.urllib_parse import parse_qsl, urlparse

def get_host_port(netloc):
    if ":" in netloc:
        host, port = netloc.split(":", 1)
        port = int(port)
    else:
        host = netloc
        port = None


url = 'http://127.0.0.1:8080'

redirect_info = urlparse(url)
redirect_host, redirect_port = get_host_port(redirect_info.netloc)

Share a complete minimal working example.

I do not have a working example

Expected behavior

 redirect_info = urlparse(self.redirect_uri)
 redirect_host, redirect_port = get_host_port(redirect_info.netloc)

    if (
            open_browser
            and redirect_host in ("127.0.0.1", "localhost")
            and redirect_info.scheme == "http"
    ):
        # Only start a local http server if a port is specified
        if redirect_port:
            return self._get_auth_response_local_server(redirect_port)

Output
TypeError: cannot unpack non-iterable NoneType object

Environment:

• OS: [Mac]
• Python version [3.7.7]
• spotipy version [2.23.0]
• Visual Studio

Additional context
Add any other context about the problem here.