I am looking for details on the database changes specifically relevant to the users from 1.5 and 3.x.
I need to move 40K users manually, and want to write a script to convert all the registered user data and authentication (not anything to do with articles) from version 1.5 to 3.x, but am not certain of the changes that I have to take into consideration in the tables, and the new layout of user and authorization relations.
Has anyone done this, know this? I'm not looking for a tool, but the details on the joomla database variations specific to the users between versions 1.5 and 3.x so that I can write a php script to migrate.
FYI, the reason i need to do this manually is that I have to also run an audit on the accounts and cross-reference them with an external member-status table to confirm their migration.