Firebase - Cloud Functions: enumerate [Object Object] - node.js

Question

I would like to enumerate the members object from the below structure.
I do not have prior experience in node.js, I have tried the following code and it doesn't seem to work.
exports.sendVaultUnlockedPush = functions.database.ref('/Vaults/{id}/action').onUpdate(event => {
let status = event.data.val();
if (status == 'lock') {
var db = admin.database();
var vaultRef = db.ref("/Vaults/" + event.params.id);
vaultRef.once('value').then(function(snapshot) {
var hasMembers = snapshot.child('members');
if (hasMembers) {
var memberRef = db.ref("Vaults/" + event.params.id + "/members");
memberRef.once('value').then(function(memberSnapshot) {
memberSnapshot.forEach(function(element) {
console(element.key + " - " + element.val());
}, this);
});
}
});
}
})
It throws the following error:
Error: Firebase.DataSnapshot.forEach failed: Was called with 2 arguments. Expects no more than 1.
at Error (native)
at z (/user_code/node_modules/firebase-admin/lib/database/database.js:42:1666)
at T.forEach (/user_code/node_modules/firebase-admin/lib/database/database.js:114:179)
at /user_code/index.js:34:36
at process._tickDomainCallback (internal/process/next_tick.js:135:7)
I would just like it to return the value of 'members' node. And I have no clue to do the same.
Any help is much appreciated in getting this sorted. Thanks!

Answer 1

According to the docs forEach takes only one parameter:
This should work:
var values;
memberSnapshot.forEach(function(element) {
console(element.key);
values = element.val();
for (var val in values) {
if (values.hasOwnProperty(val)) {
console(val, values[val]);
}
}
});
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...in