Assistant: 
User: 
    Please analyze the following code file and determine whether it belongs to any of the provided modules based on the listed module descriptions.
    Note that the provided list of modules may not be exhaustive, and some files may not belong to any of the modules. 
    If the code belongs to a module, Only output the module name, without any explanation or additional information; otherwise, return 'None' if it does not belong to any module.

    Modules : {
        "UI": "Handles the front-end user interface, consisting of HTML, CSS, and JavaScript files generated by the Angular framework. It processes user requests and interacts with the server using AJAX for data retrieval and client-side interactions."
"Test Driver": "Facilitates automated regression testing and handles transmission of test data in JSON format. It performs Java testing using TestNG and JavaScript unit-testing with Jest. It also sets up a simulated web server for servlet-level tests and automates end-to-end testing using Selenium Java."
"Logic": "Manages the business logic of TEAMMATES, including handling relationships between entities, managing transactions, input value sanitization, access control rights, and interfacing with GAE-provided or third-party APIs."
"Storage": "Performs CRUD operations on data entities, validation of data, and abstraction of GQL queries, hiding the complexities of datastore from the Logic component."
"Common": "Contains utility classes, custom exceptions, and data transfer objects used across the entire application for easy consolidation and transfer of structured data."
"E2E": "Handles end-to-end testing and load & performance testing, providing helpers, abstractions of browser pages, and test cases for E2E tests and L&P tests."
"Client": "Contains scripts for administrative tasks, such as migrating data to a new schema and calculating statistics. This module connects directly to the application back-end for administrative purposes."
    }

    Code: package teammates.ui.servlets; /** * Common servlet class that serves user authentication-related functions. */ abstract class AuthServlet extends HttpServlet { private static final MemoryDataStoreFactory DATA_STORE_FACTORY = MemoryDataStoreFactory.getDefaultInstance(); private static final HttpTransport HTTP_TRANSPORT = new NetHttpTransport(); private static final JsonFactory JSON_FACTORY = GsonFactory.getDefaultInstance(); private static final List<String> SCOPES = Arrays.asList("https://www.googleapis.com/auth/userinfo.email"); /** * Gets the authorization code flow to be used across all HTTP servlet requests. */ AuthorizationCodeFlow getAuthorizationFlow() throws IOException { return new GoogleAuthorizationCodeFlow.Builder( HTTP_TRANSPORT, JSON_FACTORY, Config.OAUTH2_CLIENT_ID, Config.OAUTH2_CLIENT_SECRET, SCOPES) .setDataStoreFactory(DATA_STORE_FACTORY) .setAccessType("offline") .build(); } /** * Returns the redirect URI for the given HTTP servlet request. */ String getRedirectUri(HttpServletRequest req) { GenericUrl url = new GenericUrl(req.getRequestURL().toString().replaceFirst("^http://", "https://")); url.setRawPath("/oauth2callback"); url.set("ngsw-bypass", "true"); return url.build(); } Cookie getLoginInvalidationCookie() { Cookie cookie = new Cookie(Const.SecurityConfig.AUTH_COOKIE_NAME, ""); cookie.setPath("/"); cookie.setSecure(!Config.IS_DEV_SERVER); cookie.setHttpOnly(true); cookie.setMaxAge(0); return cookie; } Cookie getLoginCookie(UserInfoCookie uic) { Cookie cookie = new Cookie(Const.SecurityConfig.AUTH_COOKIE_NAME, StringHelper.encrypt(JsonUtils.toCompactJson(uic))); cookie.setPath("/"); cookie.setSecure(!Config.IS_DEV_SERVER); cookie.setHttpOnly(true); cookie.setMaxAge((int) Const.COOKIE_VALIDITY_PERIOD.toSeconds()); // one week return cookie; } /** * Represents the state object to be persisted during the callback. */ static class AuthState { private final String nextUrl; private final String sessionId; AuthState(String nextUrl, String sessionId) { this.nextUrl = nextUrl; this.sessionId = sessionId; } String getNextUrl() { return nextUrl; } public String getSessionId() { return sessionId; } } }
    
Assistant: