How can I get the android.accounts.Account after successfully sign in with Google

I'm working on Android sign in with Google and hope to get the account's gender and birthday after successfully sign in. I can successfully get the birthday by using GoogleSignIn and People api. However, I notice that GoogleSignIn is deprecated and Credential Manager is recommended. After I successfully sign in by following this document:https://developer.android.com/identity/sign-in/credential-manager-siwg, the result is GetCredentialResponse. I can get idToken, name, id, etcs from this GetCredentialResponse. But GoogleAccountCredential need to set the Account, which is android.accounts.Account. Anyone know how I can get the account according GetCredentialResponse/idToken? Thanks.

private fun getAdditionalUserInfo(
activity: Activity,
account: GoogleSignInAccount,
) {
    val credential = GoogleAccountCredential.usingOAuth2(
    activity,
    listOf(
      "https://www.googleapis.com/auth/userinfo.profile",
      "https://www.googleapis.com/auth/user.birthday.read",
      "https://www.googleapis.com/auth/user.gender.read"
    )
  )
   credential.selectedAccount = account.account
   val peopleService = PeopleService.Builder(
     GoogleNetHttpTransport.newTrustedTransport(),
     GsonFactory.getDefaultInstance(),
     credential
   )
   .setApplicationName("Your Application Name")
   .build()

  viewModelScope.launch {
     try {
       val response = withContext(Dispatchers.IO) {
         peopleService.people().get("people/me")
         .setPersonFields("birthdays,genders")
         .execute()
       }

val birthdays = response?.birthdays
val genders = response?.genders

_isAccountPickerViewVisible.value = false
_googleIdTokenCredential.value =
  "birthday:$birthdays\n" +
  "genders: $genders"
} catch (e: Exception) {
e.printStackTrace()
   }
  }
 }

The Account class has a constructor that takes an email and a type. You can get the email from the GoogleIdTokenCredential (the 'id' field) and for the type, use "com.google", so you can build an account object:

Account account = new Account(googleIdTokenCredential.getId(), "com.google");

As a side note, you can also use the Authorization APIs as well, to get the tokens that you want after the sign-in.