Help me fix the error in the code connect$\_$error$)\{$

die$("$Connection failed: $".$ $conn$->$connect$\_$error$)$;

$\}$

$//$ Process form data when the form is submitted

if $($$$\_$SERVER$["$REQUEST$\_$METHOD"$]==$ "POST"$)\{$

$username $=$ $$\_$POST$[\text{'}$loginUsername$\text{'}]$;

$password $=$ $$\_$POST$[\text{'}$loginPassword$\text{'}]$;

$//$ Check if the username and password match in the Users table

$sql $=$ "SELECT $*$ FROM Users WHERE Username$=\text{'}$$username' AND Password$=\text{'}$$password'";

$result $=$ $conn$->$query$($$sql$)$;

if $($$result$->$num$\_$rows $>0)\{$

$//$ Login successful

echo "Login successful";

$//$ Redirect to the home page or another page as needed

$//$ header$("$Location: home.html$")$;

$\}$ else $\{$

$//$ Login failed

echo "Login failed. Please check your username and password.";

$\}$

$\}$

$conn$->$close$()$;

$?>$