Node.js firebase管理WebSocket错误

我与firebase管理员有问题。显然，我无法与firebase建立WebSocket连接

var admin = require("firebase-admin");
var serviceAccount = require("./realtimedemo-c6eae-firebase-adminsdk.json");

admin.initializeApp({
    credential: admin.credential.cert(serviceAccount),
    databaseURL: "https://realtimedemo-c6eae.firebaseapp.com"
});


admin.database.enableLogging(true)

var defaultDatabase = admin.database();
var ref = defaultDatabase.ref();
ref.on("value", function(snapshot) {
    console.log(snapshot.val());

}, function (errorObject) {
    console.log("The read failed: " + errorObject.code);
});

thx，请提前寻求帮助。

我找到了答案

数据库URL不正确。结尾必须是“…firebaseio.com”，而不是“firebaseapp.com”