Re-add detection of player name clash

init.lua

@@ -47,9 +47,7 @@ people.is_valid_name = function(name)
     -- Characters must be valid
     if not name:match("^[A-Za-z0-9%_%-]+$") then return false end
     -- Can't be the name of a player
-    -- TODO - re-merge get_player_last_online or find another way
-    --        of doing this!
-    -- if minetest.get_player_last_online(name) then return false end
+    if minetest.auth_table[name] then return false end
     return true
 end