How to get oauth2 token using UserCredentials method?

Question

PHP

I'm trying to screw oauth2. I'm interested in the type of authentication namely user-credentials: https://bshaffer.github.io/oauth2-server-php-docs/... That is, by login and password.
Copy-paste from the docks:

$users = array('bshaffer' => array('password' => 'brent123', 'first_name' => 'Brent', 'last_name' => 'Shaffer'));
$storage = new \OAuth2\Storage\Memory(array('user_credentials' => $users));
$grantType = new \OAuth2\GrantType\UserCredentials($storage);

$server = new \OAuth2\Server($storage);
$server->addGrantType($grantType);
$server->handleTokenRequest(\OAuth2\Request::createFromGlobals())->send();

Server response:

{"error":"invalid_client","error_description":"Client credentials were not found in the headers or body"}

For example, everything works in the Client Credentials type. But it is necessary through the login and password.

Answer 1

This library obliges to transfer also client_id and client_secret