Solved Assigning CUI command to console command?

How to assign CUI command to console command? I've done smth like this, but Im gettin error over and over again.
Button part:

Code:

 Button =
                    {  
                        Command = $"cui1" ,
                        Color = "0.8 0.8 0.8 0.2"
                    },

Command part:

Code:

[ConsoleCommand("cui1")]
        void TestCommand(IPlayer player)
        {
            var item = ItemManager.FindItemDefinition("hammer");
            BasePlayer player1 = new BasePlayer();
            Puts("Test successful!");
            player1.inventory.GiveItem(ItemManager.CreateByItemID(item.itemid, 1, 0), player1.inventory.containerBelt);
        }

And error:

Code:

[Error] Failed to call hook 'TestCommand' on plugin 'Example v1.0.0' (InvalidCastException: Cannot cast from source type to destination type.)
(19:29:18) | [Oxide] 19:28 [Debug]   at Oxide.Plugins.Example.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (HookMethod method, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String name, System.Object[] args) [0x00000] in <filename unknown>:0

 

Well I changed this line, but Im still getin error, difrent this time.
Command:

Code:

void TestCommand(ConsoleSystem.Arg argr)
        {
           
            var item = ItemManager.FindItemDefinition("hammer");
            BasePlayer player1 = new BasePlayer();
            Puts("Test successful!");
            player1.inventory.GiveItem(ItemManager.CreateByItemID(item.itemid, 1, 0), player1.inventory.containerBelt);
        }

Error:

Code:

Failed to call hook 'TestCommand' on plugin 'Example v1.0.0' (NullReferenceException: Object reference not set to an instance of an object)
(19:47:18) | [Oxide] 19:46 [Debug]   at Oxide.Plugins.Example.TestCommand (.Arg argr) [0x00000] in <filename unknown>:0
  at Oxide.Plugins.Example.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (HookMethod method, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String name, System.Object[] args) [0x00000] in <filename unknown>:0

 

Example:

Code:

            [ConsoleCommand("namehere")]
            void TestCommand(ConsoleSystem.Arg arg){
                var player = arg.connection.player as BasePlayer;
                if (player == null)
                    return;
            }

 

You can also use

Code:

arg.Player()

-which is a lot simpler.