IIRC, this method was intended ultimately to allow users to create their own external author identities (ie, to pre-emptively claim their own past email addresses so any stories imported for those email addresses in future would automatically be assigned to their account). While this looks like it would enable the initial form, I don't see the corresponding needed functionality added to the create method -- and we don't want users to get the form if they can't actually create a new external author identity for themselves? Am I missing something?