WiFi AP status doesn't change when a client connects

[sebromero]

In the example code there is this snipped which checks for new clients connecting to the AP:

// compare the previous status to the current status
  if (status != WiFi.status()) {
    // it has changed update the variable
    status = WiFi.status();

    if (status == WL_AP_CONNECTED) {
      // a device has connected to the AP
      Serial.println("Device connected to AP");
    } else {
      // a device has disconnected from the AP, and we are back in listening mode
      Serial.println("Device disconnected from AP");
    }
  }

The status doesn't seem to change even when a client successfully connects. I couldn't find any references in the WiFi library where WL_AP_CONNECTED is set. The example worked with an old version of the core as there was a hardcoded value being returned by the status function:

uint8_t arduino::WiFiClass::status() {
    // @todo: fix
    return WL_CONNECTED;
}

Probably we need to look into register_event_handler function of the WhdSoftAPInterface class. The documentation is quite limited and I couldn't find an example of how to implement it yet. https://os.mbed.com/docs/mbed-os/v6.3/feature-i2c-doxy/class_whd_soft_a_p_interface.html#a2ab8fabaa3c42aa60fc3d4438368d43f