Myth Auth - Working with groups and permissions

I've looked at the filters but it seems to only work with groups not users.

PHP Code:

$authorize = service('authorization');
$authorize->inGroup('teste', 1), // check if user 1 is in the 'teste' group
$authorize->hasPermission('users-add', 1), //checks if group 1 has 'users-add' permission
$authorize->doesUserHavePermission(1,'users-add'), //check if there is any user with 'users-add' permission in group 1 


I didn't find anything specific to work with users, but in the database there is a table called "auth_users_permissions"

I will keep doing some tests