post route in Laravel

I have done everything the right way but my submit button doesnt do anything and I dont know why....

Here is my view

<form action="" method="POST" enctype="multipart/form-data">
     @csrf
    add users via excell<input name="file" class="form-control" style="padding-bottom:3em; margin-bottom:3em" type="file">
    <div style="display:inline;">

     <input type="submit" class="btn btn-primary btn-lg" value="ارفع" >
</div>
</form>

Here is my controller

function importUser(Request $request)
 {

 #code...
 }

and my route

Route::POST('ImportUsersFile', 'ExcelUserController@importUser')->name('importUser')->middleware('Admin');

Apparently, the flow dont get in the function import user. I tried to dd into it but nothing happend!

via Chebli Mohamed