Hi, I'm back. Kevin Dangoor writes: > On a side note, I noticed that the existing PersistentUserSource doesn't use > a Rack (and, hence, doesn't use a BTree). I'd probably want to see that > change... Depends what you mean. The patched PersistentUserSource inherits from BasicUserSource which inherits from Rack. However, all of the authentication data is still stored in PersistentMappings.