How to check if a client is a bot?

bewpy · **Author**

Code:

#pragma semicolon 1

#define DEBUG

#define PLUGIN_AUTHOR "Nunya"
#define PLUGIN_VERSION "1.69"

#include <sourcemod>
#include <sdktools>
#include <geoip>

public Plugin myinfo = 
{
	name = "Connect Message", 
	author = PLUGIN_AUTHOR, 
	description = "Displays info when client connets", 
	version = PLUGIN_VERSION, 
	url = ""
};

public void OnClientPutInServer(client)
{
	char name[32],authid[64];
	
	GetClientName(client, name, sizeof(name));
	GetClientAuthId(client, AuthId_SteamID64, authid, sizeof(authid));
	PrintToChatAll("\x01[Original-Gamers] \x04%s\x01 (\x05%s\x01) has joined the server.", name, authid);
}

So when I add a bot to my server, it shows the bot joined, but shows the steamID as "STEAM_ID_STOP_IGNORING_RETVALS". Is there anyway to check if the client is fake, and if so, then just put BOT instead of the actual steam ID?