Setup Mail OTP: Line 28 me mail() uncomment karo + Server me SMTP set karo. XAMPP/Hostinger pe PHPMailer use karo. Abhi demo ke liye OTP screen pe dikh raha hai - Production me hata dena $_SESSION['admin_otp_demo'] wala.
Admins Table: admins email = admin@kvm-billz.com auto create - Aur admin add karna hai to INSERT INTO admins (email,name) VALUES ('newadmin@gmail.com','Name')