<%= error_messages_for 'admin_user' %>

(will change URL name and break URLs; unlike authorities, there is no history; you will need to rebuild the search index afterwards)
<%= text_field 'admin_user', 'name', :size => 60 %>

(you must first validate this)
<%= text_field 'admin_user', 'email', :size => 60 %>

(none or super; this is for admin features and links which are in the site proper)
<%= text_field 'admin_user', 'admin_level', :size => 60 %>

(if not blank will stop the user from filing new requests, making annotations or messaging other users; the text is shown in public on the user's page and when they try to do a forbidden action; write in the second person (you); see <%= link_to 'banned users', '../list_banned' %> for examples)
<%= text_area 'admin_user', 'ban_text', :cols => 60, :rows => 3 %>

(user's own text on their profile, format like comments):
<%= text_area 'admin_user', 'about_me', :cols => 60, :rows => 3 %>