ارور wherein

سلام وقتی من اینجوری توی روت میزنم

Route::get('/', function () {
    auth()->user()->givePermissionsTo([' delete posts','delete users']);
})->name('index');

این خطا رو به من میده:Nested arrays may not be passed to whereIn method.

و در جدول permission userچیزی اضافه نمیکنه

اینم کل فایل haspermission


namespace App\\Services\\Permission\\Traits;
use App\\Models\\Permission;
trait HasPermissions
{
    public function permissions()
    {
        return $this->belongsToMany(Permission::class,'permission_user');
    }
    public function givePermissionsTo(...$permissions)
    {
        $permissions = $this->getAllPermissions($permissions);
        if ($permissions->isEmpty()) return $this;
        $this->permissions()->syncWithoutDetaching($permissions);
        return $this;
    }
    public function withdrawPermissions(...$permissions)
    {
        $permissions = $this->getAllPermissions($permissions);
        $this->permissions()->detach($permissions);
        return $this;
    }
    protected function getAllPermissions(array $permissions)
    {
        return Permission::whereIn('name', array_flatten($permissions))->get();
    }
}

ممنون میشم راهنماییم کنید

Illuminate\\Database\\Eloquent\\Collection {#1330 ▼ // app\\Services\\Permission\\Traits\\HasPermissions.php:20 #items: array:1 [▼ 0 => App\\Models\\Permission {#1329 ▼ #connection: "mysql" #table: "permissions" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:5 [▶] #original: array:5 [▶] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [▶] } ] #escapeWhenCastingToString: false }