password = "senha do usuario na DB"
base64.b64encode(hashlib.sha256(hashlib.sha256(password).hexdigest() + "xf7x1axa6xdex8fx17vxa8x03x9d2xb8xa1Vxb2xa9>xddCx9dxc5xddxceVxd3xb7xa4x05Jrx08xb0").digest())

<?php
if (isset($_REQUEST['iniciar'])) {
    $usuario = $_REQUEST['usuario'];
    $password = $_REQUEST['senha'];

    $sql = $conexion->query("SELECT * FROM users WHERE Username='$usuario'");

    while ($login = $sql->fetch_assoc()) {
        $usuarioDB = $login['Username'];
        $passwordDB = $login['Password2'];
    }
    if ($usuario == isset($usuarioDB) && password_verify($password, $passwordDB)) {
        $_SESSION['logged'] = "Logged";
        $_SESSION['usuario'] = $usuarioDB;
        $_SESSION['senha'] = $passwordDB;
        header("Location: index.php");
    } elseif ($usuario !== isset($usuarioDB)) {
        echo "<div class='error'><span>Login inválido.</span></div>";
    } elseif (password_verify($password, $passwordDB) === FALSE) {
        echo "<div class='error'><span>Senha inválida.</span></div>";
    }
}
?>