Laravel attach data to pivot table

So i am working on a laravel project with multiple table’s and pivot table’s but i cant attach data to a specific pivot table because it wont accept the name.
as a user i want to be able to download files from the ‘file’ crud. That works. but after i downloaded i want to be able to see who downloaded what file as an admin, this does not work

the query i get is:INSERT INTO file_user (file_id, user_id) VALUES (7, 2)

i basically want to change the: file_user to download. but i have no idea how to do that without making a full query

table ‘file’

• id
  -name
  -file (document)

table ‘user’
-id
-name
-username
-role

pivot table ‘download’
-id
-file_id
-user_id

user model:

 public function role(){
        return $this->belongsTo(Role::class,'role_id');
    }
    public function file(){
        return $this->belongsToMany(File::class);
    }
    

file model:

   public function user(){
        return $this->belongsToMany(User::class);
    }
    

    protected $table = 'file';

download model (pivot)

  protected $table = 'download';
    protected $fillable = [
        'file_id',
        'user_id',
    ];

    public function file() {
        return $this->belongsTo('file');
    }

    public function user() {
        return $this->belongsTo('users');
    }

controller:

 public function download(Request $request, int $fileId)
    {
        $id = Auth::user();
        $fullfile = File::find($fileId);
       
        $downloadfile = File::find($fullfile, ['file'])->pluck('file')->last();

       // return response()->download($downloadfile);
       dd($fullfile->user()->attach($id));
        return back();
    }