If you did not want the users have the access to the WP-Admin panel, follow these simply steps to hide it:
Disable admin bar for all the users
If you want to disabled admin bar for all the users, put code below to the bottom side of your functions.php
/* Disable WordPress Admin Bar for all users but admins.*/
show_admin_bar(false);
Disable Admin Bar to all users except for Administrators
add_action('after_setup_theme', 'remove_admin_bar');function remove_admin_bar() {if (!current_user_can('administrator') && !is_admin()) { show_admin_bar(false);}}