public async Task <IActionResult> SignIn([FromBody] KioskSignInDTO signIn)
        {
            var person = await _personRepo.Find(x => x.Id == signIn.PersonId);

            if (person.PersonType == PersonType.Teacher)
            {
                var teacherSession = new Session()
                {
                    InTime       = DateTime.Now,
                    PersonId     = signIn.PersonId,
                    SemesterCode = _semesterRepo.GetAll().Last().Code
                };
                var teacherResult = await _sessionRepo.Create(teacherSession);

                if (teacherResult is Session)
                {
                    return(Created($"sessions/{teacherResult.Id}", teacherResult));
                }
                throw new TCSException("Something went wrong");
            }

            if (!signIn.Tutoring && signIn.SelectedReasons.Count() < 1)
            {
                throw new TCSException("Must select 1 or more reasons for visiting.");
            }

            var alreadySignedIn = await _sessionRepo.Exist(x => x.PersonId == signIn.PersonId && x.OutTime == null);

            if (alreadySignedIn)
            {
                throw new TCSException("You are already signed in.");
            }

            var session = new Session()
            {
                InTime         = DateTime.Now,
                SessionClasses = signIn.SelectedClasses.Select(x => new SessionClass()
                {
                    ClassId = x
                }).ToList(),
                SessionReasons = signIn.SelectedReasons.Select(x => new SessionReason()
                {
                    ReasonId = x
                }).ToList(),
                PersonId     = signIn.PersonId,
                SemesterCode = _semesterRepo.GetAll().Last().Code,
                Tutoring     = signIn.Tutoring
            };

            var result = await _sessionRepo.Create(session);

            if (result is Session)
            {
                return(Created($"sessions/{result.Id}", result));
            }
            throw new TCSException("Something went wrong");
        }