[SideX]

PHP Code:

#include <sourcemod>
#include <sdkhooks>
#include <sdktools>

public OnPluginStart()
{
    HookEvent("round_start", Event_RoundStart);
}


public Event_RoundStart(Handle:event, const String:name[], bool:dontBroadcast)
{
    new client = GetClientOfUserId(GetEventInt(event, "userid"));
    decl String:gAuth[21]
    GetClientAuthString( client, gAuth, sizeof( gAuth ) );
    if(!StrEqual(gAuth, "0:0:00000", false))
    {
        PrintToChatAll("lol");
    }
} 


try this