[ 'request' => [ // !!! insert a secret key in the following (if it is empty) - this is required by cookie validation 'cookieValidationKey' => 'cutler_EUDhEYy-Bl-cq02-OZj6Cqm1wtw9jj3U', ], 'session' => [ 'name' => '_cutlerBackendSessionId', // unique for backend 'savePath' => __DIR__ . '/../runtime', // a temporary folder on backend 'cookieParams' => [ // 'path' => '/backend/web', ], ], ], ];