public string FindFacebookProfiles(string searchText)
        {
            try
            {
                //Process authorization
                if (!ProcessAuthorization(HttpContext.Current))
                {
                    AccessDenied(HttpContext.Current);
                    return null;
                }

                FacebookApiInfo apiInfo = FacebookApiHelper.GetFacebookApiInfoForCurrentUser();

                if (apiInfo == null)
                    throw new SocialMediaAccountNotFound(SocialMediaResource.SocialMediaAccountNotFoundFacebook);

                FacebookDataProvider facebookProvider = new FacebookDataProvider(apiInfo);

                List<FacebookUserInfo> users = facebookProvider.FindUsers(searchText);
                string result = JsonConvert.SerializeObject(users);
                return result;
            }
            catch (Exception ex)
            {
                throw ProcessError(ex, "FindTwitterProfiles");
            }
        }
        public string FindUsers(string searchText, string socialNetwork)
        {
            try
            {
                //Process authorization
                if (!ProcessAuthorization(HttpContext.Current))
                {
                    AccessDenied(HttpContext.Current);
                    return null;
                }
                if (socialNetwork.ToLower() == "twitter")
                {
                    TwitterDataProvider provider = new TwitterDataProvider(TwitterApiHelper.GetTwitterApiInfoForCurrentUser());
                    List<TwitterUserInfo> users = provider.FindUsers(searchText);
                    return GetTwitterUserListPage(users);
                }
                if (socialNetwork.ToLower() == "facebook")
                {
                    FacebookApiInfo apiInfo = FacebookApiHelper.GetFacebookApiInfoForCurrentUser();

                    if (apiInfo == null)
                        throw new SocialMediaAccountNotFound(SocialMediaResource.SocialMediaAccountNotFoundFacebook);

                    FacebookDataProvider facebookProvider = new FacebookDataProvider(apiInfo);

                    List<FacebookUserInfo> users = facebookProvider.FindUsers(searchText);
                    return GetFacebookUserListPage(users);
                }
                return null;

            }
            catch (Exception ex)
            {
                throw ProcessError(ex, "FindUsers");
            }
        }