cssd-back/app/Policies/MedicalCenterPolicy.php

<?php

namespace App\Policies;

use App\User;
use App\MedicalCenter;

class MedicalCenterPolicy
{
    public function list(User $User)
    {
        if($User->hasRole('Admin'))
            return true;
    }
    public function delete(User $User, MedicalCenter $MedicalCenter)
    {
        if($User->hasRole('Admin') && $MedicalCenter->users->count() == 0)
            return true;
    }

    public function update(User $User, MedicalCenter $MedicalCenter)
    {
        if($User->hasRole('Admin'))
            return true;
    }

    public function store(User $User)
    {
        if($User->hasRole('Admin'))
            return true;
    }
    public function getByMedicalCenter(User $User, MedicalCenter $MedicalCenter)
    {
        if($User->hasRole('Admin') || $MedicalCenter->id == $User->medical_center_id) {
            return true;
        }
        return false;
    }
}