* **auth:** check for existing token before login ([66](https://github.com/jina-ai/jina-hubble-sdk/issues/66)) ([98abd60](https://github.com/jina-ai/jina-hubble-sdk/commit/98abd602116f4c92f9ae7a65006893a910db9a94))
* **get_token:** verify if token is valid, if not, return None ([e8aea73](https://github.com/jina-ai/jina-hubble-sdk/commit/e8aea7369876616a8e0a9775f4941213be0a0c52))
* wrongly set the __version__ to 0 ([e1abe39](https://github.com/jina-ai/jina-hubble-sdk/commit/e1abe390b1ddbd06d4315232599c97db6a71e602)), closes [#62](https://github.com/jina-ai/jina-hubble-sdk/issues/62)