Best Practice for pulling data in Laravel

I'm relatively new with Laravel and I'm learning as well as working on Laravel based projects.

My question is what are Laravel Model/Eloquent Best Practices:

Is it better to pull records from the database this way Where I have only one function in my user Model like 'staff()':

$managers = $users->staff()->where('usertype', manager');

Or is better to pull records from the database this way Where I have multiple functions in my user Model like 'staff()', 'managers()', 'clerks()':

$managers = $users->managers();
$clerks = $users->clerks();

So basically, I'm asking if Such database related logic should be handled on Model end or Controller end?

PS: I'm on Laravel 5.5

via Chebli Mohamed