// Post api/FBGetProfile
        public async Task<HttpResponseMessage> Post(AccountId accountid)
        {
            HttpStatusCode httpStatus = HttpStatusCode.OK;
            MobileServiceContext context = new MobileServiceContext();

            ServiceUser user = this.User as ServiceUser;
            if (user == null)
            {
                throw new InvalidOperationException("This can only be called by authenticated clients");
            }
            FacebookCredentials creds = (await user.GetIdentitiesAsync()).OfType<FacebookCredentials>().FirstOrDefault();
            if (creds != null)
            {
                var fbDataProvider =  new FBProfileDataProvider(creds.AccessToken);
                Network facebook = context.Networks.First(n => n.Id == (Int16)NetworkType.FACEBOOK);
                ProfileData fbProfileData = await fbDataProvider.GetUserInfo();
                UserInfo userInfo;
                if (context.UserInfos.Any(ui => ui.UserId == accountid.accountid))
                {
                    userInfo = context.UserInfos.Include("UserInfoDetail").First(ui => ui.UserId == accountid.accountid);
                    userInfo.Bio = fbProfileData.Bio;
                    userInfo.About = fbProfileData.About;
                    userInfo.ProfilePicUrl = fbProfileData.ProfilePicUrl;
                    // TODO: Update other propoerties
                    UserInfoDetail detail = userInfo.UserInfoDetails.First(x => x.NetworkId == facebook.Id);
                    if (detail == null)
                    {
                        detail = new UserInfoDetail() { JsonInfo = fbProfileData.AsJsonString(), NetworkId = facebook.Id };
                        userInfo.UserInfoDetails.Add(detail);
                    }
                    else
                        detail.JsonInfo = fbProfileData.AsJsonString();
                }
                else
                {
                    userInfo = new UserInfo() { UserId = accountid.accountid };
                    userInfo.SetProfileInfo(fbProfileData);
                    userInfo.Id = Guid.NewGuid().ToString();
                    userInfo.UserInfoDetails.Add(new UserInfoDetail() { JsonInfo = fbProfileData.AsJsonString() });
                    context.UserInfos.Add(userInfo);
                }
                context.SaveChanges();
                httpStatus = HttpStatusCode.Created;
                return this.Request.CreateResponse(httpStatus, userInfo);
            }

            throw new Exception("Facebook identity not found");
        }