__construct ( $client_id = NULL, $client_secret = NULL )
__get ( $k )
__set ( $k, $v )
addAuthorizationScope ( $scope )
authenticate ( $code, $state )
getAuthorizationHeader ( )
getAuthorizationUrl ( array $auth_params = array ( ), $response_method = 'GET' )
getUserInfo ( )
revokeToken ( $token, $type = NULL )
setAuthorizationScopes ( $scopes )