Update docs, fix missing priv check

README.md

@@ -32,8 +32,16 @@ Notes are freeform text, and will appear in the account report
 
 ## Editing Users
 
-Editing users using the GUI isn't yet supported. To update a user,
-you can import again from .CSV
+When you click "Save" in the Create/Update section, it'll copy the fields into
+the user list. If the user exists, it'll be overridden. Otherwise, a new user
+will be created in the list.
+
+You can click a row in the list to copy from the user list to the fields.
+
+To copy a user, you can click it in the user list, change the name, and then
+click save.
+
+Clicking Delete will delete the user with the given name.
 
 
 ## Exporting

bulk_create.lua

@@ -254,6 +254,10 @@ end
 
 
 function bulk_dialog.on_submit(player, context, fields)
+	if not minetest.check_player_privs(player, { server = true }) then
+		return
+	end
+
 	context.message = ""
 
 	if fields.import_files then