@Override
@WorkerThread
@NonNull
public List<String> getProvidersForEmail(@Nullable String emailAddress) {
if (emailAddress == null) {
return Collections.emptyList();
}
ProviderQueryResult result = await(mFirebaseAuth.fetchProvidersForEmail(emailAddress));
if (hasProviders(result)) {
return result.getProviders();
}
return Collections.emptyList();
}
private boolean hasProviders(@Nullable ProviderQueryResult result) {
return result != null && result.getProviders() != null && result.getProviders().size() > 0;
}