Fresh should export a Storage interface which means it can work with any storage provider. Out of the box, it should come with its own implementation: FreshTokenStorage, based on Hive.

Currently fresh allows the user to store tokens in which every token storage they may choose.
What if fresh acted a little bit like HydratedBloc and provided a HydratedBlocStorage which is based on Hive.

And additionally the end user should be given an option to extend HydratedStorage to use whichever storage media they choose.

For my private project I have extended OAuth2Token and created a new Token class and corresponding type adapter which can be stored in Hive.

And Extended TokenStorage to create a HiveTokenStorage.