public async Task <double> GetDistance(double fromLat, double fromLong, double toLat, double tolong)
        {
            if (!int.TryParse(_context.User.Claims.FirstOrDefault(cl => cl.Type == "id")?.Value, out var userId))
            {
                RaiseError("unauthorized", HttpStatusCode.Unauthorized);
            }

            var distance = await _distanceRepo.GetQueryableItems(predicate : en => en.FromLat == fromLat && en.FromLong == fromLong && en.ToLat == toLat && en.ToLong == tolong).SingleOrDefaultAsync();

            var request = new Request()
            {
                UserId = userId
            };

            if (distance == null)
            {
                request.Distance = new Distance()
                {
                    FromLat  = fromLat,
                    FromLong = fromLong,
                    ToLat    = toLat,
                    ToLong   = tolong,
                    Value    = GeoUtil.GetDistance(fromLat, fromLong, toLat, tolong)
                };
            }

            if (distance != null)
            {
                request.DistanceId = distance.Id;
            }

            await _RequestRepo.InsertAsync(request);

            await _unitofWork.SaveChangesAsync();

            return(distance != null ? distance.Value : request.Distance.Value);
        }