[keycloak-dev] session.userLocalStorage() needs to be fronted by cache

[Bill Burke]

I think I made a mistake when User Storage Providers are importing into 
local cache.  Currently KeycloakSession.userLocalStorage() does not have 
a cache in front of it.  The LDAP and Kerberos providers call this to 
determine if the user has been imported or not.  The thing is, the user 
may already be cached and I think there is a possibility of updating the 
user (on demand resync) and getting stale cache entries. Also, we don't 
want a database hit every time there is validation happening.

So, I'm going to figure out a way to have the cache front the 
userLocalStorage() method too like we do for userStorage().  This will 
require some refactoring of UserCacheSession.  Not sure if that will 
conflict with Marek's work.

Bill