/// <summary>
        /// This method returns the account information of a dropbox account
        /// </summary>
        /// <param name="token"></param>
        /// <returns></returns>
        public static DropBoxAccountInfo GetAccountInformation(ICloudStorageAccessToken token)
        {
            // generate the dropbox service
            var service = new DropBoxStorageProviderService();

            // generate a session
            var session = service.CreateSession(token, DropBoxConfiguration.GetStandardConfiguration());
            if (session == null)
                return null;

            // receive acc info
            var accInfo = service.GetAccountInfo(session);

            // close the session
            service.CloseSession(session);

            // go ahead
            return accInfo;
        }
        /// <summary>
        /// This method offers the mobile login api of dropbox for users who are migrating from version 0 of the 
        /// dropbox API because version 1 supports token based logins only
        /// </summary>
        /// <param name="username"></param>
        /// <param name="password"></param>
        /// <param name="appkey"></param>
        /// <param name="appsecret"></param>
        /// <returns></returns>
        public static ICloudStorageAccessToken LoginWithMobileAPI(String username, String password, String appkey, String appsecret)
        {
            // get the configuration
            var configuration = DropBoxConfiguration.GetStandardConfiguration();

            // build the consumer context
            var consumerContext = new OAuthConsumerContext(appkey, appsecret);

            // build up the oauth session
            var serviceContext = new OAuthServiceContext(configuration.RequestTokenUrl.ToString(),
                                                         configuration.AuthorizationTokenUrl.ToString(), configuration.AuthorizationCallBack.ToString(),
                                                         configuration.AccessTokenUrl.ToString());

            // get a request token from the provider      
            var svc = new OAuthService();
            var oAuthRequestToken = svc.GetRequestToken(serviceContext, consumerContext);
            if (oAuthRequestToken == null)
            {
                throw new SharpBoxException(SharpBoxErrorCodes.ErrorInvalidConsumerKeySecret);
            }
            var DropBoxRequestToken = new DropBoxToken(oAuthRequestToken, new DropBoxBaseTokenInformation {ConsumerKey = appkey, ConsumerSecret = appsecret});

            // generate the dropbox service
            var service = new DropBoxStorageProviderService();

            // build up a request Token Session
            var requestSession = new DropBoxStorageProviderSession(DropBoxRequestToken, configuration, consumerContext, service);

            // build up the parameters
            var param = new Dictionary<String, String>
                            {
                                {"email", username},
                                {"password", password}
                            };

            // call the mobile login api 
            var result = "";

            try
            {
                int code;
                result = DropBoxRequestParser.RequestResourceByUrl(DropBoxMobileLogin, param, service, requestSession, out code);
                if (result.Length == 0)
                    throw new UnauthorizedAccessException();
            }

#if MONOTOUCH || WINDOWS_PHONE || MONODROID
            catch (Exception ex)
            {
                if (ex is UnauthorizedAccessException)
                    throw ex;
                else
                    throw new SharpBoxException(SharpBoxErrorCodes.ErrorCouldNotContactStorageService, ex);
            }
#else
            catch (System.Web.HttpException netex)
            {
                throw new SharpBoxException(SharpBoxErrorCodes.ErrorCouldNotContactStorageService, netex);
            }
#endif

            // exchange a request token for an access token
            var accessToken = new DropBoxToken(result);

            // adjust the token 
            if (accessToken.BaseTokenInformation == null)
            {
                accessToken.BaseTokenInformation = new DropBoxBaseTokenInformation
                                                       {
                                                           ConsumerKey = appkey,
                                                           ConsumerSecret = appsecret
                                                       };
            }


            // go ahead
            return accessToken;
        }