The simplest method would be to create a single page and use a custom page template.
For example, make a page with slug my-account
. Then create a template and name it page-my-account.php
.
Then within that template, check if the user is logged in, and load their data if they are.
if( is_user_logged_in() ){
$current_user = wp_get_current_user();
echo 'Username: ' . $current_user->user_login . '<br />';
echo 'User ID: ' . $current_user->ID;
} else {
echo 'You must be logged in to view this page';
}