private void CheckAndFillData()
        {
            UserService userService = new UserService();

            if (userService.CheckExisting())
            {
                userService.AddUser(new AppUser {
                    FirstName = "Admin", Username = "******", LastName = "Admin", Password = "******"
                });
                userService.AddUser(new AppUser {
                    FirstName = "Aleksa", Username = "******", LastName = "Milivojevic", Password = "******"
                });
                userService.AddUser(new AppUser {
                    FirstName = "Marija", Username = "******", LastName = "Semerad", Password = "******"
                });
            }

            TicketService ticketService = new TicketService();

            if (ticketService.CheckExisting())
            {
                ticketService.AddTicket(new AppTicket()
                {
                    Tag = "2D-STANDARD", Price = "200"
                });
                ticketService.AddTicket(new AppTicket()
                {
                    Tag = "3D-STANDARD", Price = "500"
                });
                ticketService.AddTicket(new AppTicket()
                {
                    Tag = "4D-STANDARD", Price = "800"
                });
                ticketService.AddTicket(new AppTicket()
                {
                    Tag = "2D-VIKEND", Price = "300"
                });
                ticketService.AddTicket(new AppTicket()
                {
                    Tag = "3D-VIKEND", Price = "600"
                });
                ticketService.AddTicket(new AppTicket()
                {
                    Tag = "4D-VIKEND", Price = "900"
                });
                ticketService.AddTicket(new AppTicket()
                {
                    Tag = "2D-UTORAK", Price = "150"
                });
                ticketService.AddTicket(new AppTicket()
                {
                    Tag = "3D-UTORAK", Price = "400"
                });
                ticketService.AddTicket(new AppTicket()
                {
                    Tag = "4D-UTORAK", Price = "700"
                });
            }

            Service service = new Service();

            if (service.CheckExistingTheaters())
            {
                service.AddTheater(new Theater()
                {
                    CityTag = "NS", Name = "BIG Cinestar", Tag = "000000001"
                });
                service.AddTheater(new Theater()
                {
                    CityTag = "NS", Name = "Arena Cinestar", Tag = "000000002"
                });
                service.AddTheater(new Theater()
                {
                    CityTag = "NS", Name = "Promenada Cineplex", Tag = "000000003"
                });
                service.AddTheater(new Theater()
                {
                    CityTag = "BG", Name = "Usce Cinestar", Tag = "000000004"
                });
                service.AddTheater(new Theater()
                {
                    CityTag = "BG", Name = "DeltaCity Cineplex", Tag = "000000005"
                });
            }

            if (service.CheckExistingAuditoriums())
            {
                service.AddAuditorium(new Auditorium()
                {
                    Number = 1, TheaterTag = "000000001"
                });
                service.AddAuditorium(new Auditorium()
                {
                    Number = 2, TheaterTag = "000000001"
                });
                service.AddAuditorium(new Auditorium()
                {
                    Number = 3, TheaterTag = "000000001"
                });

                service.AddAuditorium(new Auditorium()
                {
                    Number = 1, TheaterTag = "000000002"
                });
                service.AddAuditorium(new Auditorium()
                {
                    Number = 2, TheaterTag = "000000002"
                });
                service.AddAuditorium(new Auditorium()
                {
                    Number = 3, TheaterTag = "000000002"
                });

                service.AddAuditorium(new Auditorium()
                {
                    Number = 1, TheaterTag = "000000003"
                });
                service.AddAuditorium(new Auditorium()
                {
                    Number = 2, TheaterTag = "000000003"
                });
                service.AddAuditorium(new Auditorium()
                {
                    Number = 3, TheaterTag = "000000003"
                });

                service.AddAuditorium(new Auditorium()
                {
                    Number = 1, TheaterTag = "000000004"
                });
                service.AddAuditorium(new Auditorium()
                {
                    Number = 2, TheaterTag = "000000004"
                });
                service.AddAuditorium(new Auditorium()
                {
                    Number = 3, TheaterTag = "000000004"
                });

                service.AddAuditorium(new Auditorium()
                {
                    Number = 1, TheaterTag = "000000005"
                });
                service.AddAuditorium(new Auditorium()
                {
                    Number = 2, TheaterTag = "000000005"
                });
                service.AddAuditorium(new Auditorium()
                {
                    Number = 3, TheaterTag = "000000005"
                });
            }
            TicketItemService ticketItemService = new TicketItemService();

            if (ticketItemService.CheckExisting())
            {
                ticketItemService.AddTicketItem(new AppTicketItem {
                    Theater = "BIG Cinestar", Auditorium = "1", Ticket = "2D-STANDARD", Row = "1", Seats = "1", Quantity = "5"
                });
                ticketItemService.AddTicketItem(new AppTicketItem {
                    Theater = "BIG Cinestar", Auditorium = "2", Ticket = "2D-STANDARD", Row = "2", Seats = "1", Quantity = "5"
                });
                ticketItemService.AddTicketItem(new AppTicketItem {
                    Theater = "BIG Cinestar", Auditorium = "3", Ticket = "2D-UTORAK", Row = "3", Seats = "5", Quantity = "3"
                });
                ticketItemService.AddTicketItem(new AppTicketItem {
                    Theater = "Arena Cinestar", Auditorium = "1", Ticket = "3D-STANDARD", Row = "4", Seats = "10", Quantity = "8"
                });
                ticketItemService.AddTicketItem(new AppTicketItem {
                    Theater = "Arena Cinestar", Auditorium = "2", Ticket = "4D-STANDARD", Row = "5", Seats = "15", Quantity = "2"
                });
                ticketItemService.AddTicketItem(new AppTicketItem {
                    Theater = "Arena Cinestar", Auditorium = "3", Ticket = "2D-VIKEND", Row = "6", Seats = "20", Quantity = "4"
                });
                ticketItemService.AddTicketItem(new AppTicketItem {
                    Theater = "Usce Cinestar", Auditorium = "1", Ticket = "3D-UTORAK", Row = "7", Seats = "8", Quantity = "3"
                });
                ticketItemService.AddTicketItem(new AppTicketItem {
                    Theater = "Usce Cinestar", Auditorium = "2", Ticket = "4D-VIKEND", Row = "8", Seats = "16", Quantity = "2"
                });
                ticketItemService.AddTicketItem(new AppTicketItem {
                    Theater = "Usce Cinestar", Auditorium = "3", Ticket = "2D-STANDARD", Row = "9", Seats = "18", Quantity = "2"
                });
            }
        }