How to get player who pressed UI button?

Development Programming & Scripting Verse
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1

Trying to make a weapon selection UI. The actual UI is pretty simple but I can’t figure out how to grant one specific player(the one who pressed the button on the UI) the weapons from the granter. I don’t even know where to start so here’s the code I have so far:

    OG_Button.OnClick().Subscribe(OG_Pressed)
    New_Button.OnClick().Subscribe(New_Pressed)

    OG_Pressed(Message:widget_message):void =
        # Insert code that grants items to player who pressed button
        # Code below closes UI
        if (PlayerUI:player_ui = GetPlayerUI[Message.Player], MyUI: overlay = MyMap[Message.Player]?, SelectedButton: text_button_base = text_button_base[Message.Source]):
            PlayerUI.RemoveWidget(MyUI)
           if (MyMap[Message.Player] = false) {}
        return

    New_Pressed(Message:widget_message):void =
        # Insert code that grants items to player who pressed button
        # Code below closes UI
        if (PlayerUI:player_ui = GetPlayerUI[Message.Player], MyUI: overlay = MyMap[Message.Player]?, SelectedButton: text_button_base = text_button_base[Message.Source]):
            PlayerUI.RemoveWidget(MyUI)
           if (MyMap[Message.Player] = false) {}
        return

Any suggestions with how I would do this?