This is the combined Android Mod Menu + Java Login Project Mod Menu project credits given to @LGL
Open the main activity of the project and find this line.
public static String URL = "https://example.com/login.php"; (Probably in line 52)
Here you can add your server URL
Goto :- https://github.com/PMTDVA/PHP-Web-Server
Also there is a Video Tutorial for that
Video Tutorial:-