1. Consult the Official Huawei Documentation: This is the most important step. Check the official Huawei Mobile Services documentation (developer website) for the most up-to-date guidance on authenticating with Huawei ID and integrating with AGConnectAuth. Look for updated code samples, best practices, and API references for the current authentication flow. They should explicitly state the replacement for the deprecated methods.

2. Identify the New Authentication Flow: The documentation should describe a new way to acquire the necessary authentication credentials (likely ID tokens). The steps will likely involve using the updated Huawei ID APIs to initiate the sign-in process. The response will likely include an ID token which can be used in the  AGConnectAuthCredential  directly or in a similar way.

3. Update Your Code: Based on the documentation, refactor your code to use the new API methods and data structures to initiate the authentication and receive the ID token. You'll use this ID token to create the  AGConnectAuthCredential .

4. Test Thoroughly: After migrating your code, carefully test all integration points to ensure the authentication works correctly in various scenarios, including error handling.