automatic style fixes and new workflows

Enable oauth service plugins to implement their own procedures on logout

Although some oauth services need their own procedures on logout
(e.g. Keycloak needs to access the logout endpoint), there i

Enable oauth service plugins to implement their own procedures on logout

Although some oauth services need their own procedures on logout
(e.g. Keycloak needs to access the logout endpoint), there is no way to
implement them. Fix it.

Signed-off-by: Naoto Kobayashi <naoto.kobayashi4c@gmail.com>

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drop concept of GUID and introduce storageID

Previously we created a new GUID for any user trying to login via oauth.
That GUID was used to store the token states. This polluted the cache
area but e

drop concept of GUID and introduce storageID

Previously we created a new GUID for any user trying to login via oauth.
That GUID was used to store the token states. This polluted the cache
area but even worse, it made it impossible to stay logged in on multiple
devices when the IdP invalidated onld access tokens when issuing a new
one (like google does).

Now a session storage is used for the initial login. Permanent storage
is only initialized after a successful login (based on the user's email
address).

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moved token refresh to adapter class

This also takes care of saving the refresh token for when it's not
renewed on refresh (like Google doesn't).

check for request token on login

renamed our Service to Adapter to avoid confusion

Also added a mechanism to register Services from an adapter