Why keep redirecting to wp-login?

To apply the oauth function to the rest api, I set it as follows.
https://localhost/customdev/oauthcb/authorization_code-1.php

# authorization_code-1.php
<?php

# require('Client.php');
# require('GrantType/IGrantType.php');
# require('GrantType/AuthorizationCode.php');

require("vendor/autoload.php");

const CLIENT_ID     = 'U988ri1rs3XRZVrqwOAxXLi3QjmUu3TKBlOUTGZ8';
const CLIENT_SECRET = 'O0jXuRxwHt1Kcq3uZWG0AouefXupgvrJp7mYKqqq';

const REDIRECT_URI           = 'https://localhost/customdev/oauthcb/authorization_code-1.php';
const AUTHORIZATION_ENDPOINT = 'https://localhost/oauth/authorize';
const TOKEN_ENDPOINT         = 'https://localhost/oauth/token';

$client = new OAuth2\Client(CLIENT_ID, CLIENT_SECRET);
if (!isset($_GET['code']))
{
    $auth_url = $client->getAuthenticationUrl(AUTHORIZATION_ENDPOINT, REDIRECT_URI);
    header('Location: ' . $auth_url);
    die('Redirect');
}
else
{
    $params = array('code' => $_GET['code'], 'redirect_uri' => REDIRECT_URI);
    $response = $client->getAccessToken(TOKEN_ENDPOINT, 'authorization_code', $params);

    echo "<pre>";
    print_r($response);

    # parse_str($response['result'], $info);
    # $client->setAccessToken($info['access_token']);
    # $response = $client->fetch('https://graph.facebook.com/me');
    # var_dump($response, $response['result']);
}

https://wp-oauth.com/docs/how-to/setup-wp-oauth-server-for-single-sign-on-with-wordpress/
There is a similar example, so I followed it. It doesn’t seem to work.

However, different from the applied value, it is redirected to /wp-login.php

I set it to two things, authorization_code and implicit.
I also turned off the “jetpack brute force protection” feature.
I’ve tested it on both staging and production sites and it doesn’t works.
(The staging site is a subdomain method)

Why doesn’t works?
Why do I keep redirecting to wp-login?

The docs docs do not provide detailed explanations for these issues.

• This topic was modified 4 years, 7 months ago by sinho0689.
• This topic was modified 4 years, 7 months ago by sinho0689.
• This topic was modified 4 years, 7 months ago by sinho0689.