Auth Google I/O release note update (#705)

Author: chkuang-g

auth/src/swig/auth.i

@@ -1268,6 +1268,22 @@ static CppInstanceManager<Auth> g_auth_instances;
   public string SmsCode { get { return SmsCodeInternal; } }
 %}
 
+%attributestring(firebase::auth::PhoneAuthCredential, std::string, SmsCodeInternal, sms_code);
+%typemap(cscode) firebase::auth::PhoneAuthCredential %{
+  /// Gets the auto-retrieved SMS verification code if applicable.
+  ///
+  /// This method is supported on Android devices only. It will return empty strings on
+  /// other platforms.
+  ///
+  /// When SMS verification is used, you will be called back first via
+  /// @ref PhoneAuthProvider.CodeSent, and later
+  /// PhoneAuthProvider.VerificationCompleted with a PhoneAuthCredential containing
+  /// a non-null SMS code if auto-retrieval succeeded. If Firebase used another approach
+  /// to verify the phone number and triggers a callback via
+  /// @ref PhoneAuthProvider.VerificationCompleted, then the SMS code can be null.
+  public string SmsCode { get { return SmsCodeInternal; } }
+%}
+
 %typemap(csclassmodifiers) firebase::auth::FederatedAuthProvider "public class";
 
 %typemap(csclassmodifiers) firebase::auth::FederatedOAuthProvider

docs/readme.md

@@ -82,6 +82,13 @@ Release Notes
       `FetchAsync` and `ActivateAsync` APIs aren't affected by this change.
       To learn more, see
       [Get started with Firebase Remote Config](https://firebase.google.com/docs/remote-config/get-started?platform=unity#add-real-time-listener).
+    - Auth: Deprecated a number of methods, appending `_DEPRECATED` to some of
+      their names. This is a breaking change; you must either modify your code
+      to refer to the `_DEPRECATED` methods, or switch to the new methods, which
+      have new return types `AuthResult` (rather than `SignInResult`). The
+      deprecated methods will be removed in the *next* major release of the
+      Firebase Unity SDK. *(Note: do not mix and match using the old
+      and new methods or undefined behavior may result.)*
 
 ### 10.7.0
 - Changes