public function linkForm($user_id)
{
$user = User::find($user_id);
if ($user == null) {
abort(404);
}
if ($user->id != Auth::id() && !Auth::user()->can('board')) {
abort(403);
}
return view('users.study.edit', ['link' => null, 'user' => $user, 'studies' => Study::orderBy('name', 'asc')->get()]);
}
