Getting a disalowed_useragent when using Google authentication in Xamarin

The application was working before, but now throws the following error:

403: disalowed_useragent

The error in question is due to a relatively recent change from Google in terms of what user agents it supports for performing user authentication/authorization.

We have released a new SDK that is compatible with the supported approaches from Google, but depending on what you were using before it may require some changes to your application.

For reference information see: