public GroupController()
        {
            CollectionController  collectionController  = new CollectionController();
            UserProfileController userProfileController = new UserProfileController();

            if (_list == null)
            {
                _list = new List <Group>
                {
                    new Group()
                    {
                        Id           = Guid.NewGuid(),
                        Name         = "Família",
                        Collection   = collectionController.Get("PKM99"),
                        Participants = userProfileController.Get()
                    },

                    new Group()
                    {
                        Id           = Guid.NewGuid(),
                        Name         = "Trabalho",
                        Collection   = collectionController.Get("FWC18"),
                        Participants = userProfileController.Get().Where(x => x.Login.Equals("lucasbbudelon") || x.Login.Equals("lady")).ToList()
                    },

                    new Group()
                    {
                        Id           = Guid.NewGuid(),
                        Name         = "Faculdade",
                        Collection   = collectionController.Get("TLK94"),
                        Participants = userProfileController.Get().Where(x => x.Login.Equals("lucasbbudelon") || x.Login.Equals("veri")).ToList()
                    }
                };
            }
        }