Atomic NPC Items Drop

I'm just trying to make a NPC Item Drop, but at this line I'm lost:

Code:

Line 21 - Clockwork.item:Spawn(entity:GetPos() + Vector(0, 0, 8), nil, RandomItem)

It say this in my console when I kill a npc:

Code:

[Clockwork:NPCDrop]
The 'OnNPCKilled' hook has failed to run.
gamemodes/cwatomic/plugins/npcdrop/plugin/sh_plugin.lua:21: attempt to call method 'Spawn' (a nil value)

 

Ok, solved, my bad:

Clockwork.item:CreateInstance(entity:GetPos() + Vector(0, 0, 8), nil, RandomItem)

Now this problem pop x')

Code:

[Clockwork:NPC Item Drop]
The 'OnNPCKilled' hook has failed to run.
gamemodes/clockwork/framework/libraries/sh_item.lua:493: bad argument #1 to 'lower' (string expected, got userdata)

@kurozael

 

Code:

    local itemTable = Clockwork.item:FindByID("uniqueID_de_ton_objet_ici")
    local position = (self:GetPos() + Vector(0, 0, 32));
  
    if (itemTable and !itemTable.isBaseItem) then
        local itemTable = Clockwork.item:CreateInstance(itemTable("uniqueID"));
        local entity = Clockwork.entity:CreateItem(player, itemTable, position);
        if (IsValid(entity)) then
            entity:SetPos( position );
            Clockwork.entity:MakeFlushToGround(entity, position, position);
        end
    end