public IHttpActionResult createAppointment([FromBody] CreateAppointments entity)
        {
            try
            {
                if (entity == null)
                {
                    ModelState.AddModelError("Entity", "First set the entity");
                }

                if (!ModelState.IsValid)
                {
                    return(BadRequest(ModelState));
                }

                appointmentsServices.createAppointment(Convert.ToDateTime(entity.assignmentDate), entity.patientId, entity.doctorId);

                return(Ok());
            }
            catch (Exception e)
            {
                return(InternalServerError(e));
            }
        }