public function authorize($authorize_url, $client_id, $redirect_uri, $scope = "user", $client_secret, $uri, $uri_token, $homepage)
{
$req = new oauth2();
$req->request($authorize_url, $client_id, $redirect_uri, $scope);
$req->authorize($client_id, $client_secret, $redirect_uri, $uri, $uri_token);
$req->back($homepage);
}
