public async Task <LoginResponseModel> Put()
        {
            LoginResponseModel model = new LoginResponseModel();

            try
            {
                var       username            = GetUserNameFromRequest(Request);
                decimal[] usersAllowedToLogin = new decimal[] { 1, 4, 13, 27 };

                var filteredRecords = Db.C_records.Where(r => usersAllowedToLogin.Contains(r.@class));

                var record = filteredRecords.FirstOrDefault(r => r.username == username);
                if (record == null || record.status != 1)
                {
                    model.ResponseError.Code    = 403;
                    model.ResponseError.Message = "User is not permitted to log in through the app.";
                    return(model);
                }

                //If the user logs in and they already have an active session, update the session
                //expiry. Otherwise create a new session.
                var session = RecordSessionUtilities.ActiveSessionByUserId(Db, record.id);

                if (session == null)
                {
                    session = new record_sessions
                    {
                        session_token   = GenerateTokenForUser(),
                        C_records       = record,
                        session_expiry  = DateTime.UtcNow.Add(RecordSessionUtilities.SlidingSessionExpiryInDays),
                        client_platform = String.Join(" ", Request.Headers.UserAgent),
                        initial_logon   = DateTime.UtcNow
                    };
                    Db.record_sessions.Add(session);
                    await Db.SaveChangesAsync();
                }
                else
                {
                    var newExpiry = session.session_expiry.Add(RecordSessionUtilities.SlidingSessionExpiryInDays);
                    session.session_expiry = newExpiry;
                    await Db.SaveChangesAsync();
                }

                model.SessionToken = session.session_token;
                model.Profile      = GetProfile(record.id);
                return(model);
            }
            catch (Exception e)
            {
                model.ResponseError.Code    = 500;
                model.ResponseError.Message = $"Exception {e} was thrown.";
                return(model);
            }
        }
        public LoginResponseModel PutV2()
        {
            LoginResponseModel model = new LoginResponseModel();

            try
            {
                var username = GetUserNameFromRequest(Request);

                var record = Db.C_records.FirstOrDefault(r => r.username == username);

                if (record == null || record.status != 1 || !UserRights.V2LoginClasses.Contains(record.@class))
                {
                    model.SetError(403, "User is not permitted to log in through the app.");
                    return(model);
                }

                //If the user logs in and they already have an active session, update the session
                //expiry. Otherwise create a new session.
                var session = RecordSessionUtilities.ActiveSessionByUserId(Db, record.id);

                if (session == null)
                {
                    session = new record_sessions
                    {
                        session_token   = GenerateTokenForUser(),
                        C_records       = record,
                        session_expiry  = DateTime.UtcNow.Add(RecordSessionUtilities.SlidingSessionExpiryInDays),
                        client_platform = string.Join(" ", Request.Headers.UserAgent),
                        initial_logon   = DateTime.UtcNow
                    };
                    Db.record_sessions.Add(session);
                    Db.SaveChanges();
                }
                else
                {
                    var newExpiry = session.session_expiry.Add(RecordSessionUtilities.SlidingSessionExpiryInDays);
                    session.session_expiry = newExpiry;
                    Db.SaveChanges();
                }

                model.SessionToken = session.session_token;
                model.Profile      = GetProfile(record.id);
            }
            catch (Exception e)
            {
                model.SetError(500, $"Exception {e} was thrown.");
            }
            return(model);
        }