public FbContact GetLoggedInUser()
        {
            Authenticate();

            string call_id = GetNextCallNr();

            Dictionary <string, string> requestParams = new Dictionary <string, string>();

            requestParams.Add("method", "users.getloggedinuser");
            requestParams.Add("api_key", apiKey);
            requestParams.Add("session_key", sessionKey);
            requestParams.Add("call_id", call_id);
            requestParams.Add("v", "1.0");

            var result = channel.GetLoggedInUser(apiKey, sessionKey, call_id, GenerateSignature(requestParams, sessionSecret));
            var userId = result.Value;

            return(GetUsersInfo(userId).First());
        }