How to use information from the customer record ?

Hello,
In the file listing.php, I want to display some information of the members present in their file.
For that I did:

	<?php

	$EFIdUser = $user->id;

	echo $EFIdUser;

	$UserEmail = $EFIdUser->getFieldValue('JOOMLA_EMAIL');

	echo $UserEmail;

	?>

But I have an error message.

I also need to retrieve "users.layout.profiletitle" to display it.

Would you guide me?

Best regards.

Eric