public function authorize($redirect_uri, $scope = Client::SCOPE_READ) {
		header('Location: ' . $this->getAuthorizeUri($redirect_uri, $scope));
		exit;
	}
public function authorize($redirect_uri, $scope = Client::SCOPE_READ) {
		header('Location: ' . $this->getAuthorizeUri($redirect_uri, $scope));
		exit;
	}
public function authorize ( $ redirect_uri , $ scope = Client :: SCOPE_READ ) { header ( 'Location: ' . $ this -> getAuthorizeUri ( $ redirect_uri , $ scope ) ) ; exit ; }
Begin authorization.

@param string $redirect_uri
@param string $scope (optional)
@redirect
Begin authorization .