Cartalyst\Sentinel\Users\EloquentUser::getPersistableKey PHP Method

    public function getPersistableKey()
    {
        return $this->persistableKey;
    }

 public function testSetAndGetPersistableKey()
 {
     $user = new EloquentUser();
     $user->setPersistableKey('foo_id');
     $this->assertEquals('foo_id', $user->getPersistableKey());
 }