On authentication triggers I am getting displayName as null

问题

I want to use users data on authentication trigger. But when I am using them it gives me null. What is wrong with my code?

exports.sendWelcomeMessage = functions.auth.user().onCreate((user) => {
    const name = user.displayName;
    console.log(name);
    return null;
})

回答1:

I speculate you are creating the user and then setting the display name (eg via 2 calls).

onCreate triggers as soon as the user is created, eg createUserWithEmailAndPassword.

When you call updateProfile to set the displayName, the onCreate event would have already been triggered.

来源：https://stackoverflow.com/questions/62433949/on-authentication-triggers-i-am-getting-displayname-as-null