<T> SingleTransformer<T, T> get() {
            return single -> single.retry((retryCount, throwable) -> {
                boolean isRetryNecessary = false;

            if (retryCount <= MAX_RETRIES) {
                ExceptionCause cause = getCause(throwable);

                if (cause == ExceptionCause.SSL) {
                    handleIt();
                    isRetryNecessary = true;
                }
                if (cause != ExceptionCause.OTHER) {
                    registerUser();
                    isRetryNecessary = true;
                }
            }
            return isRetryNecessary;
        });

Single registerUser() {

        return Single.fromFuture(ApiCallRegister())
                .subscribeOn(Schedulers.io())
                .unsubscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread());
    }