If you use "#define SKIP_FP_CONTROL" line fingerprint changes will no more be a problem. If you comment the line fingerprint will be questioned. So fp control will be an optional codeblock.

Path of file is :"C:\Users(Your_user_name)\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.4.2\libraries\ESP8266WiFi\src"