Extract value of an element from object instance

Question

Here is my code to get the current users phone number.

  Future<void> getCurrentUser() async {
    try {
      AuthUser user = await Amplify.Auth.getCurrentUser();
      print(user.signInDetails);
    } on AuthException catch (e) {
      safePrint('Error retrieving current user: ${e.message}');
    }
  }

The print statement above which extracts the values of the signInDetails array, does not allow me to go deeper one more level. Here is result if I just print the object instance -

CognitoSignInDetailsApiBased {
I/flutter (19338):   "signInType": "apiBased",
I/flutter (19338):   "username": "+14160000000",
I/flutter (19338):   "authFlowType": "USER_SRP_AUTH"
I/flutter (19338): }

How do I just get the value of username element above.

Answer 1

According to the docs you posted, AuthUser#signInDetails returns an instance of SignInDetails, documented here. It looks like there isn't an accessor username, but there is a toJson() method that returns a map. Given that, you should be able to print just the username value via print(user.signInDetails.toJson()['username'])

Answer 2

You can do this:

Future<void> getCurrentUser() async {
  try {
    AuthUser user = await Amplify.Auth.getCurrentUser();

    if (user.signInDetails is CognitoSignInDetailsApiBased) {
      String username = (user.signInDetails as CognitoSignInDetailsApiBased).username;

      print("Username: $username");
    } else {
      print("Unable to retrieve the username.");
    }
  } on AuthException catch (e) {
    safePrint('Error retrieving current user: ${e.message}');
  }
}

CognitoSignInDetailsApiBased class