Explore possibility of configuration driven Provider for to the letter OAuth2 spec. custom servers

[ralphschindler]

Ideally support some workflow like:

$provider = new League\OAuth2\Client\Provider\Provider([
    'grantType' => 'zzzzzzz', // possibly not needed?
    'tokenUrl' => 'ccccc',
    'refreshUrl' => 'aaaaaa',
    'clientId'  =>  'XXXXXXXX',
    'clientSecret'  =>  'XXXXXXXX',
    'redirectUri'   =>  'https://your-registered-redirect-uri/',
    'scopes' => array('email', '...', '...'),
));

[philsturgeon]

Yeah you wouldn't need to grant type that early on, that would be relevant later.

    public $clientId = '';
    public $clientSecret = '';
    public $redirectUri = '';
    public $state;
    public $name;
    public $uidKey = 'uid';
    public $scopes = [];
    public $method = 'post';
    public $scopeSeparator = ',';
    public $responseType = 'json';
    public $headers = null;

These are the items that would need to be configurable to make a GenericProvider possible.