[next] Start a clean session when user logs in / out (#1853)

* Clear user session after login / logout

* Filename cases

* Improve type checking

* Apply suggestions

src/core/server/graph/tenant/schema/schema.graphql

@@ -809,12 +809,8 @@ type Query {
 
   """
   me is the current logged in User.
-
-  clientAuthRevision is an implementation detail that is only
-  used on the client to invalidate the cache.
-  TODO: This should move to a client side directive if this becomes possible.
   """
-  me(clientAuthRevision: Int): User
+  me: User
 
   """
   settings is the Settings for a given Tenant.