Email/Password auth provider returns empty userRecord - firebase

Question

I have a cloud function that is triggered by Auth user creation. I look up the user data (email, name, etc) to populate my DB. It suddenly stopped working for the 'email/password' Auth provider type. The admin.auth().getUser(uid) now returns a userRecord which contains undefined/null values for most fields. This seemingly stopped working out of nowhere in Production after functioning for several weeks, is there any possible explanation?
exports.createUser = functions.auth.user().onCreate((user) => {
return createEmailUser(user);
});
function createEmailUser(user) {
const uid = user.uid;
return admin.auth().getUser(uid)
.then(function(userRecord) {
console.log(userRecord);
const email = userRecord.email;
const fullName = userRecord.displayName;
admin.database().ref('users/' + uid).set({
email: email,
name: fullName
});
})
.catch(function(error) {
console.log("Error fetching user data:", error);
});
}
In the past, the userRecord object contains valid email and displayName values. Now, I see an object like this:
UserRecord {
uid: 'Lrtj8zafsnYjZl4ckMgwNkgEiVH2',
email: undefined,
emailVerified: false,
displayName: undefined,
photoURL: undefined,
phoneNumber: undefined,
disabled: false,
metadata:
UserMetadata {
creationTime: 'Wed, 09 Jan 2019 21:40:31 GMT',
lastSignInTime: null },
providerData: [],
passwordHash: undefined,
passwordSalt: undefined,
customClaims: undefined,
tokensValidAfterTime: 'Wed, 09 Jan 2019 21:40:31 GMT' }

Answer 1

As users are registered with Email/Password method, then there is only the email address available in userRecord. Other sign-in providers might have different data at user creation.
What you can do here is to check user data at profile creation, and update profile with updateUser if anything is missing:
function createEmailUser(user) {
const uid = user.uid;
admin.auth().updateUser(uid, {
phoneNumber: "[phone]",
displayName: "Foo Bar"
})
.then(function(userRecord) {
console.log(userRecord);
})
.catch(function(error) {
console.log("Error fetching user data:", error);
});
}