DO_NOT_USE_AUTH_CACHE

The [class@AuthManager] should not use the credentials cache for this message, neither to use cached credentials to automatically authenticate this message nor to cache the credentials after the message is successfully authenticated.

This applies to both server and proxy authentication. Note that [signal@Message::authenticate] signal will be emitted, if you want to disable authentication for a message use [method@Message.disable_feature] passing SOUP_TYPE_AUTH_MANAGER instead.