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.e2e.util; /** * Provides an access to real Gmail inbox used for testing. * * <p>Authentication via a real username (Google ID) and password is required. */ public final class EmailAccount { private Gmail service; private String username; /** * Constructs an email client for the {@code username}. */ public EmailAccount(String username) { this.username = username; } /** * Triggers the authentication process for the associated {@code username}. */ public void getUserAuthenticated() throws IOException { // assume user is authenticated before service = new GmailServiceMaker(username).makeGmailService(); int retryLimit = 5; while (retryLimit > 0) { try { retryLimit--; // touch one API endpoint to check authentication getListOfUnreadEmailFromSender(1L, ""); break; } catch (HttpResponseException e) { if (e.getStatusCode() == HttpStatusCodes.STATUS_CODE_FORBIDDEN || e.getStatusCode() == HttpStatusCodes.STATUS_CODE_UNAUTHORIZED || e.getStatusCode() == HttpStatusCodes.STATUS_CODE_BAD_REQUEST) { System.out.println(e.getMessage()); // existing credential missing or not working, should do authentication for the account again service = new GmailServiceMaker(username, true).makeGmailService(); } else { throw new IOException(e); } } } } /** * Returns true if unread mail that arrived in the past minute contains mail with the specified subject. */ public boolean isRecentEmailWithSubjectPresent(String subject, String senderEmail) throws IOException, MessagingException { List<Message> messageStubs = getListOfUnreadEmailFromSender(10L, senderEmail); for (Message messageStub : messageStubs) { Message message = service.users().messages().get(username, messageStub.getId()).setFormat("raw") .execute(); MimeMessage email = convertFromMessageToMimeMessage(message); boolean isSubjectEqual = email.getSubject().equals(subject); boolean isSentWithinLastMin = message.getInternalDate() > System.currentTimeMillis() - TimeUnit.MINUTES.toMillis(1); if (isSubjectEqual && isSentWithinLastMin) { markMessageAsRead(messageStub); return true; } } return false; } /** * Returns a list of up to maxResults number of unread emails from the sender. * Returns an empty list if there is no unread email from sender. */ private List<Message> getListOfUnreadEmailFromSender(long maxResults, String senderEmail) throws IOException { List<Message> messageStubs = service.users().messages().list(username) .setQ("is:UNREAD from:" + senderEmail).setMaxResults(maxResults).execute() .getMessages(); return messageStubs == null ? new ArrayList<>() : messageStubs; } private void markMessageAsRead(Message messageStub) throws IOException { ModifyMessageRequest modifyMessageRequest = new ModifyMessageRequest() .setRemoveLabelIds(Collections.singletonList("UNREAD")); service.users().messages().modify(username, messageStub.getId(), modifyMessageRequest).execute(); } private MimeMessage convertFromMessageToMimeMessa
Assistant: