return ebayApiReactiveWrapper
        .getSessionId(apiContext)
        .flatMap(sessionId ->
            request
                .session()
                .map(webSession -> {
                    webSession
                        .getAttributes()
                        .put("ebay_session_id", sessionId);

                    return sessionId;
                })
        )
        .flatMap(sessionId -> {
            final UriBuilder uriBuilder = uriBuilderFactory.uriString(
                ebayApiSettings.getSignInUrl()
            );

            uriBuilder.queryParam("runame", ebaySettings.getRuName());
            uriBuilder.queryParam("SessID", sessionId);

            return ServerResponse.temporaryRedirect(redirectUri).build();
        });