class MyCustomClient extends \League\OAuth2\Client\Provider\AbstractProvider
{
    public function getResourceOwnerDetailsUrl(AccessToken $token)
    {
        ...
    }

    public function getBaseAuthorizationUrl()
    {
        ...
    }

    public function getBaseAccessTokenUrl(array $params)
    {
        ...
    }
}

class MyCustomClient extends \Cloudcogs\OAuth2\Client\OpenIDConnect\AbstractOIDCProvider
{
    ...
}

$provider = new MyCustomClient([
   'clientId'                => 'XXXXXX',    // The client ID assigned to you by the provider
   'clientSecret'            => 'XXXXXX',    // The client password assigned to you by the provider
   'redirectUri'             => 'https://my.example.com/your-redirect-url/',
   'urlAuthorize'            => 'https://service.example.com/authorize',
   'urlAccessToken'          => 'https://service.example.com/token',
   'urlResourceOwnerDetails' => 'https://service.example.com/resource'
]);

$provider = new MyCustomClient([
    'clientId'                => 'XXXXXX',    // The client ID assigned to you by the provider
    'clientSecret'            => 'XXXXXX',    // The client password assigned to you by the provider
    'redirectUri'             => 'https://my.example.com/your-redirect-url/',
    'well_known_endpoint'     => 'https://identity.provider.com/.well-known/openid-configuration',
    'publickey_cache_provider'=> '',
]);

// Get the discovered configurations from the provider instance
$discovered = $provider->Discovery();

// Access standard OpenID Connect configuration via supported methods
$issuer = $discovered->getIssuer();
$supported_grants = $discovered->getGrantTypesSupported();
$authorization_endpoint = $discovered->getAuthorizationEndpoint();

// Or overloading for provider specific configuration
$custom_config = $discovered->custom_config;

// Cast to string to obtain the raw JSON discovery response
// All available properties for overloading can be seen in the JSON object.
$json_string = (string) $discovered;

$storageAdapter = new \Laminas\Cache\Storage\Adapter\MongoDB($mdbOptions);

$provider = new MyCustomClient([
    'clientId'                => 'XXXXXX',    // The client ID assigned to you by the provider
    'clientSecret'            => 'XXXXXX',    // The client password assigned to you by the provider
    'redirectUri'             => 'https://my.example.com/your-redirect-url/',
    'well_known_endpoint'     => 'https://identity.provider.com/.well-known/openid-configuration',
    'publickey_cache_provider'=> $storageAdapter,
]);

// Decode the access token
$access_token = $AccessToken->getToken();
$data = $provider->introspectToken($access_token);

// Decode the refresh token
$refresh_token = $AccessToken->getRefreshToken();
$data = $provider->introspectToken($refresh_token);