`AuthUser.username` property returns a UUID on iOS but returns an email address on Android

[mbernson]

Describe the bug

Hi, I'm working on two native apps that both use the latest version of the Amplify SDK with AWS Cognito as the auth provider. On both platforms we use the username property of the AuthUser to show the user's email address in the UI. On Android this works as expected, but on iOS it returns the same value of the userId property - which is a UUID.

Steps To Reproduce

Steps to reproduce the behavior:
1. Log in using an AWS Cognito auth provider with the Amplify SDK
2. Get the current user: `let user = Amplify.Auth.getCurrentUser()`
3. Print the user's username: `print(user?.username)`
4. See the user's userId (UUID)

Expected behavior

1. To see the user's email address

Amplify Framework Version

1.28.1

Amplify Categories

Auth

Dependency manager

Swift PM

Swift version

5.7

CLI version

n/a

Xcode version

14.0

Relevant log output

No response

Is this a regression?

No

Regression additional context

No response

Device

iPhone 11, iPhone 13 simulator

iOS Version

iOS 16

Specific to simulators

No

Additional context

No response

[harsh62]

@mbernson The team is actively working on unifying getCurrentUser API behaviour on all platforms. We will post an update on the ticket after the change has been implemented.

Meanwhile, I would like to recommend to use Fetch Attributes API to get logged in user details.

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[harsh62]

Amplify 2.0 has been released which normalizes what values are returned in the getCurrentUser API. The API will now use the accessToken to determine the userId and username values. Adding the reference to the implementation as well.