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by upofadown 2779 days ago
If the refresh token is only being used for authentication and expires in a reasonable time for the application then you would not need prior consent so you would not need a banner. You would still have to explicitly disclose what you are doing on some sort of easy to find cookie policy page.

Some good discussion here:

* http://ec.europa.eu/ipg/basics/legal/cookies/index_en.htm