Error in accessing UID in Firebase Authentication Xamarin

Question

I'm working on incorporating Firebase Authentication into my Xamarin app. The Firebase docs say that indicate that I can access a new user's UID in a completion method after they complete the CreateUser() method (https://firebase.google.com/docs/auth/ios/start). I have the following code in my IOS project within my Xamarin solution:

Auth.DefaultInstance.CreateUser(email, password, (AuthDataResult authResult, Foundation.NSError error) => {

    authResult.User.GetIdToken((string token, Foundation.NSError error1) => 
    {
        Console.WriteLine("Token Is");
        Console.WriteLine(token);
    });

});

When the method fires, it says 'authResult' is Null. Specifically, the above method throws the following exception:

System.NullReferenceException has been thrown Object reference not set to an instance of an object.

How can I access the user's UID?

If there is an error creating the user, authResult.User will be null. — Frank van Puffelen
– Frank van Puffelen, Commented Nov 15, 2018 at 18:33
Sure enough, when I write the 'error' to the console, something comes up! Thanks! — Russ J
– Russ J, Commented Nov 15, 2018 at 18:55

Frank van Puffelen · Accepted Answer · 2018-11-15 20:02:21Z

1

If there is an error creating the user, authResult.User will be null. So you'll need to check for that in your code:

Auth.DefaultInstance.CreateUser(email, password, (AuthDataResult authResult, Foundation.NSError error) => {
  if (error == null) {
    authResult.User.GetIdToken((string token, Foundation.NSError error1) => {
        Console.WriteLine("Token Is");
        Console.WriteLine(token);
    });
  }
});

answered Nov 15, 2018 at 20:02

Frank van Puffelen

603k85 gold badges895 silver badges869 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Error in accessing UID in Firebase Authentication Xamarin

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related