public IActionResult Post([FromBody] StateModel state)
        {
            var addedState = _service.Add(new Business.Service.DTOs.State.StateDto
            {
                Title           = state.Title,
                FlowId          = state.FlowId,
                NextStateId     = state.NextStateId,
                PreviousStateId = state.PreviousStateId
            });

            if (addedState == null)
            {
                return(UnprocessableEntity());
            }

            return(Created(new Uri($"{Request.Scheme}://{Request.Host}{Request.Path}/{addedState.Id}"), addedState));
        }