/**
* Return a Twitch authentication URL.
*
* @param string $client
* @param string $redirect
* @param string $scopes
* @return string
*/
public static function url($client = null, $redirect = null, $scopes = null)
{
return sprintf("%s/oauth2/authorize?%s", Application::api(), http_build_query(['response_type' => 'code', 'client_id' => $client ?: Application::client(), 'redirect_uri' => $redirect ?: Application::redirect(), 'scope' => $scopes ?: Application::scopes()]));
}
