Get Current User (ID or Email)

Find a user by ID/email or automatically detect the current logged-in/author page user.

$user  = CFGP_U::get_user();                 // Auto (logged-in or author)
$user2 = CFGP_U::get_user(123);              // By ID
$user3 = CFGP_U::get_user('user@mail.tld');  // By email
if ( $user ) {
    // $user->ID, $user->user_email, ...
}