private void PopulateClientManager()
        {
            IReadOnlyEntityRepository <User> userRepository = ServiceRegistry.GetService <RepositoryManager>().GetRepository <User>();

            var clientManager = new ClientManager();

            foreach (User user in userRepository.GetAllEntities())
            {
                if (user.Id == DefaultUser.Id)
                {
                    ConnectedUserClientHandler = new MockClientHandler();

                    clientManager.AddClientHandler(user.Id, ConnectedUserClientHandler);
                }
                else
                {
                    clientManager.AddClientHandler(user.Id, new MockClientHandler());
                }
            }

            ServiceRegistry.RegisterService <IClientManager>(clientManager);
        }