Tested Xavier - PHP Login Script & User Management Admin Panel 3.2.3

[Fixed] PHP 8.2: Dynamic Properties are deprecated - declared propertis at top of classes
[Updated] Registration.php (declared properties at top of class)
[Updated] Session.php (declared properties at top of class)
[Updated] Adminfunctions.php (declared properties at top of class)
[Updated] Login.php (declared properties at top of class)