Hello,
There is following code

[Codebox]
#include <AWS_IOT.h>
#include <WiFi.h>
#include "time.h"
#include <stdio.h>
#include <esp_bt_main.h>
#include <esp_bt.h>
#include <esp_wifi.h>

char WIFI_SSID[]="zzz";
char WIFI_PASSWORD[]="zzzz";

void callback(){
//placeholder callback function
}

void ...