Sentry Multiple Groups Assignment

Question

I want to assign multiple groups to a user using sentry, how can I accomplish that?

I have a group table having id, name and permissions columns.

$groups = Sentry::findGroupById(1); anyway I can get multiple groups and then assign 

$groups while creating user $user = Sentry::register([ 'permisions' => $groups]);

Answer 1

Found out the solution

foreach ($group as $g) {
    $addGroup= Sentry::findGroupById($g);
    $user->addGroup($addGroup);
}