How to disable that text on join?
You currently have XY unspent reward tokens! Spend them in the reward store using /s

Edit that to that:

void OnPlayerInit(BasePlayer player)
        {
            if (player != null)
            {
                uiManager.DestroyUI(player, true);
                /* var ID = player.userID;
                if (CheckPoints(ID) > 0)
                    InformPoints(player);*/
            }
        }​

/*private void InformPoints(BasePlayer player)
        {
            var outstanding = CheckPoints(player.userID);
            if (configData.Options.NPCOnly)
                SendMSG(player, string.Format(msg("msgOutRewardsnpc", player.UserIDString), outstanding));
            else SendMSG(player, string.Format(msg("msgOutRewards1", player.UserIDString), outstanding));
        }
        */​

Or just go into the lang file, and turn this : 

"msgOutRewards1": "You currently have {0} unspent reward tokens! Spend them in the reward store using /s",

to this : 

"msgOutRewards1": "",

Ah okay, I deleted just the line, but it spawned again after reload, ty anyway