Use this function to register a new column in the users table:
function users_custom_columns( $column ) {
$column['security_answer'] = 'Security Answer';
return $column;
}
add_filter( 'manage_users_columns', 'users_custom_columns' );
And this function to display the new custom column:
function display_users_custom_columns( $val, $column_name, $user_id ) {
switch ($column_name) {
case 'security_answer' :
return get_user_meta( $user_id, 'meta_key', true);
default:
}
return $val;
}
add_filter( 'manage_users_custom_column', 'display_users_custom_columns', 10, 3 );
You can place the code in your functions.php or in a custom plugin.