Testing BelongsToMany relationship with pivot table - laravel

Question

I'm trying to figure out how to create all the data based on this relationship testing in Laravel.
Company Model
class Company
{
public function stores()
{
return $this->hasMany(Store::class, 'company_id');
}
public function employers()
{
return $this->belongsToMany(User::class, 'employers',
'company_id', 'user_id');
}
}
Store Model
class Store
{
public function company()
{
return $this->belongsTo(Company::class, 'company_id');
}
public function employers()
{
return $this->belongsToMany(User::class, 'employers',
'store_id', 'user_id');
}
}
User Model
class User
{
public function company()
{
return $this->belongsToMany(Company::class, 'employers',
'user_id', 'company_id');
}
public function store()
{
return $this->belongsToMany(Store::class, 'employers',
'user_id', 'store_id');
}
}
$company = Company::factory()->hasStores(
Store::factory()->hasEmployers(User::factory())
)->create();
dd($company) // App\Models\Company {#2470... Ok!
$store = $company->store()->first();
dd($store) // App\Models\Store {#2479... Ok!
$user = $store->employers()->first();
dd($user) // null (T-T)
Background: this is an application that allows a proprietor to own several companies. For that reason, I got many relationships, and even so, employees sometimes can only belong to a single company or store.

Answer 1

Try:
$store = $company->store->first();
dump($store);
$user = $store->employers->first();
dump($user);

Answer 2

Try something like this with DB Facade
private $employ;
public function setUp(): void
{
$this->employ = Employ::factory()->create([
'id' => 14,
'name' => 'Name Employ'
]);
}
public function test_pivote_table()
{
$user = User::factory()->create([
'name' => 'User test'
);
//here :)
DB::table('name_pivote_table')->insert([
'user_id' => $user->id,
'employ_id' => $this->employ->id
]);
}
Credits to Fguzman :)