private function oAuthRequest($url, $method, array $parameters)
{
$request = Request::fromConsumerAndToken($this->consumer, $this->token, $method, $url, $parameters);
if (array_key_exists('oauth_callback', $parameters)) {
// Twitter doesn't like oauth_callback as a parameter.
unset($parameters['oauth_callback']);
}
if ($this->bearer === null) {
$request->signRequest($this->signatureMethod, $this->consumer, $this->token);
$authorization = $request->toHeader();
} else {
$authorization = 'Authorization: Bearer ' . $this->bearer;
}
return $this->request($request->getNormalizedHttpUrl(), $method, $authorization, $parameters);
}