I came too the predecessor, HtgroupsPlugin, for the single remaining mentioning of old AccountManagerPlugin config option password_format to get redirected to this plugin.
It seems, there has been a series of failed communication, that lead to who more plugins instead of enhancements to AcctMgr. As current maintainer if AcctMgr I've be willing to do re-integration of the current functionality including various valid patches waiting here to be commented/applied.
I do offer co-maintenance, that is obviously needed to process current tickets, or integration of code into AcctMgr, making both plugins obsolete for the benefit of users (preferred - reducing the "plugin jungle").
What do you think? I could leave it as it is, or just take the code, but would rather have a clear path to follow for interested parties and salvage good ideas and effort put into patches I've seen attached to pending tickets for HtGroupEditorPlugin.