Step 1: Describe your environment

• Android device: OnePlus 6
• Android OS version: 9
• Google Play Services version: 15.4.22
• Firebase/Play Services SDK version: com.google.firebase:firebase-auth:18.0.0
• FirebaseUI version: 5.0

Step 2: Describe the problem:

Using EmailLink sign in, in combination with a custom ui crashes the app.

Steps to reproduce:

1. Enable EmailLink in Firebase console
2. Enable EmailLink in AuthProvider: AuthUI.IdpConfig.EmailBuilder().enableEmailLinkSignIn().setActionCodeSettings(email).build(),
3. Set Custom AuthMethodPicker layout: .setAuthMethodPickerLayout(layout)
4. Start startActivityForResult(intent, )

Observed Results:

• What happened?
  App crashes with Caused by: java.lang.IllegalStateException: No button found for auth provider: emailLink

Expected Results:

• What did you expect to happen?
  AuthPickerActivity should be launched with my custom email button

Relevant Code:

private val providers =
      listOf(            AuthUI.IdpConfig.EmailBuilder().enableEmailLinkSignIn().setRequireName(true).setActionCodeSettings(ActionCodeSettings.newBuilder()
.setAndroidPackageName("package.name", true, null)
          .setHandleCodeInApp(true)
          .setUrl("https://google.com") // This URL needs to be whitelisted
.build()).build()
      )

private val picker = AuthMethodPickerLayout.Builder(_layout).setEmailButtonId(R.id.btn).build()

val intent = AuthUI.createSignInIntentBuilder()
          .setAuthMethodPickerLayout(picker)
          .setAvailableProviders(providers)
          .build()

startActivityForResult(intent, 1234)

The reason this error occurs, is that when you call .enableEmailLinkSignIn the provider Id changes from "password" to "emailLink" -> hence when populateIdpListCustomLayout is called, there is no matching button