Braintree\OAuthGateway::connectUrl PHP Method

    public function connectUrl($params = [])
    {
        $query = Util::camelCaseToDelimiterArray($params, '_');
        $query['client_id'] = $this->_config->getClientId();
        $queryString = preg_replace('/\\%5B\\d+\\%5D/', '%5B%5D', http_build_query($query));
        $url = $this->_config->baseUrl() . '/oauth/connect?' . $queryString;
        return $url . '&signature=' . $this->computeSignature($url) . '&algorithm=SHA256';
    }