diff --git a/join.lua b/join.lua
index b41ef90..515d8e4 100644
--- a/join.lua
+++ b/join.lua
@@ -46,9 +46,9 @@ end
 -- Code formspec on join for fediauth enabled players
 minetest.register_on_joinplayer(function(player)
     local playername = player:get_player_name()
-    playerpos_stor[playername] = player:getpos()
+    playerpos_stor[playername] = player:get_pos()
     armor_stor[playername] = player:get_armor_groups()
-    if minetest.settings.get_bool("fediauth.make_immortal_player", true) then
+    if minetest.settings:get_bool("fediauth.make_immortal_player", true) then
     	player:set_armor_groups({immortal = 1})
     end
 
@@ -210,6 +210,12 @@ if minetest.settings:get_bool("fediauth.position_lock", true) then
 		if fediauth_sessions[playername] ~= nil then
 			if playerpos ~= playerpos_stor[playername] then -- position lock, stupid, but works as possible
 				-- maybe compatible with others mods who override physics
+				-- player can't move too far (around 1-2 blocks, default walk speed)
+				-- Why not just kick when move? Because:
+				-- - if you joined and fall from sky without fly privege
+				-- - if your position on slope and etc...
+				-- Why not just use physics override? Because
+				-- - It not work with mod like flyspeed
 				player:add_velocity({x = (playerpos_stor[playername].x - playerpos.x) * 2,
 						     y = (playerpos_stor[playername].y - playerpos.y) * 2,
 						     z = (playerpos_stor[playername].z - playerpos.z) * 2})