i need help unity get data from php

hey, i really stucked in my project. i have 2 scenes in my project. Scene 1 is register page with form inputfield inside canvas. Scene 2 is php database update. character / heroes gender selection. in my database, i have a user tables (id, username, password, email, nickname, gender)

in scene 1 there is a form with input username, password, email, nickname. there is no problem in scene 1, im successfully to put username, pass, etc to my database. my problem is scene 2, how can i update my gender data in scene 2 according username from input field in scene1. how to get the username from scene1 to set user gender. because i need the username for my php script (UPDATE gender FROM users WHERE username =inputfield username from scene 1). hope someone can solving my problem. thanks :)