public async Task CanJoinChatRoom()
        {
            RealtimeDataService service = new RealtimeDataService();

            ChatRoom room = new ChatRoom()
            {
                Name = "testRoom", Id = TestRoomId
            };
            await service.CreateChatRoom(room);

            User testUser = new User()
            {
                Name = "testUser1", Id = TestUser1Id
            };
            await service.Register(testUser);

            User testUser2 = new User()
            {
                Name = "testUser2", Id = TestUser2Id
            };
            await service.Register(testUser2);

            List <User> peopleFromDb = await service.GetAllUsers();

            ChatRoom roomFromDb = await service.GetChatRoom(TestRoomId);

            foreach (var person in peopleFromDb)
            {
                await service.JoinChatRoom(person.Id, roomFromDb.Id);
            }
        }
        public async Task CanCreateUser()
        {
            RealtimeDataService service = new RealtimeDataService();
            User person = new User()
            {
                Name = "testUser", Id = TestUser1Id
            };
            await service.Register(person);

            await service.Register(person);

            User personFromDb = await service.GetUser(TestUser1Id);

            Assert.AreEqual(person.Name, personFromDb.Name);
        }