Firebase Docs Reference ProviderQueryResult public interface ProviderQueryResult This interface was deprecated. In favour of SignInMethodQueryResult Result object that contains a list of strings that represent authentication provider IDs. For example, PROVIDER_ID or PROVIDER_ID. Public Method Summary abstract List<String> getProviders() Returns a List of string representing auth-provider ids. Public Methods public abstract List<String> getProviders () Returns a List of string representing auth-provider ids. The list can be null or empty. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated May 23, 2018.