source: binary-improvements/7dtd-server-fixes/src/CustomCommands/Unban.cs@ 210

using System;
using System.Collections.Generic;

namespace AllocsFixes.CustomCommands
{
        public class Unban : ConsoleCommand
        {
                public Unban (ConsoleSdtd cons) : base(cons)
                {
                }

                public override string Description ()
                {
                        return "unban a player";
                }

                public override string[] Names ()
                {
                        return new string[] { "unban", string.Empty };
                }

                public override void Run (string[] _params)
                {
                        try {
                                if (_params.Length != 1) {
                                        m_Console.SendResult ("Usage: unban <steamid>");
                                        return;
                                }

                                long tempLong;
                                if (_params [0].Length != 17 || !long.TryParse (_params [0], out tempLong)) {
                                        m_Console.SendResult ("Not a valid Steam ID.");
                                        return;
                                }

                                AdminTools at = CommonMappingFunctions.GetGameManager ().adminTools;
                                if (!at.isBanned (_params [0])) {
                                        m_Console.SendResult ("Steam ID is not banned.");
                                        return;
                                }

                                at.RemoveBan (_params [0]);
                                m_Console.SendResult ("Removed ban for Steam ID " + _params [0]);
                        } catch (Exception e) {
                                Log.Out ("Error in Unban.Run: " + e);
                        }
                }
        }
}