What is arduino_secrets.h

I found an interesting AccelWebServer sketch which could help me doing my own sw. But the compiler does not find the “arduino_secrets.h” file. Do I need it, what it is and so on.
Edit: It looks like the file is not needed. And the sketch gets a time out after a few runs.

#include <SPI.h>
#include <WiFiNINA.h>
#include <Arduino_LSM6DS3.h>
#include "arduino_secrets.h"
///////please enter your sensitive data in the Secret tab/arduino_secrets.h
char ssid[] = hhghghgu;        // your network SSID (name)
char pass[] = jkjkjmn;    // your network password (use for WPA, or use as key for WEP)
int keyIndex = 0;                 // your network key Index number (needed only for WEP)
int status = WL_IDLE_STATUS;
WiFiServer server(80);

Its a header file where all examples store the SSID and password. By using this header file you can simply share your code and we can just drop our own arduino_secrets.h file into the sketch folder and everything works. The way you wrote your code you have to change the SSID and password before sharing.

the content of this file is not shared if you share the sketch in Arduino Create web editor.
and is presented with a GUI in web editor

https://create.arduino.cc/editor/Juraj/7cfa8dbe-f571-4f5e-8bff-4c5f23f3729b/preview

I see. Thanks.