SimpleOAuth2Handler::RefreshAccessToken PHP Метод

    public function RefreshAccessToken(array $credentials)
    {
        if (empty($credentials['refresh_token'])) {
            throw new OAuth2Exception('Offline access (refresh_token) required.');
        }
        if (empty($credentials['client_id'])) {
            throw new OAuth2Exception('client_id required.');
        }
        if (empty($credentials['client_secret'])) {
            throw new OAuth2Exception('client_secret required.');
        }
        $params = array('refresh_token' => $credentials['refresh_token'], 'client_id' => $credentials['client_id'], 'client_secret' => $credentials['client_secret'], 'grant_type' => 'refresh_token');
        $endpoint = $this->GetAccessEndpoint();
        $response = $this->MakeRequest($endpoint, $params);
        return array_merge($credentials, $response, array('timestamp' => time()));
    }