Authentication as an application returns an
AppToken which is passed to the
authenticationResult property of the
WWClient. This includes setting the expiry date for authentication. Subsequent calls using the same
WWClient object will check whether the expiry date has passed, in which case it will re-authenticate.
When authenticating as an application, there is no refresh token, so no need to store the
AppToken. There is a method available in 0.8.0 to store this, but it will be removed in future versions.