* Combining OpenId and OfflineAccess scope
When the client scope is set to "openid offline_access", the returned scope only has the "offline_access" scope. The "openid" scope and the "id_token" are missing. By combining the OpenId and OfflineAccess as return scope, the refresh_token and id_token are returned.
* Update MemberController.cs
Cleaner way, provided by @kjac, to check if the scope has openid and/or offiline_access set.