<%@page pageEncoding="UTF-8" contentType="text/html; charset=UTF-8"%>
<h3 class="card-title">
	<c:if test="${crudMode == null}">
		<la:message key="labels.crud_title_list" />
	</c:if>
	<c:if test="${crudMode == 1}">
		<la:message key="labels.crud_title_create" />
	</c:if>
	<c:if test="${crudMode == 2}">
		<la:message key="labels.crud_title_edit" />
	</c:if>
	<c:if test="${crudMode == 3}">
		<la:message key="labels.crud_title_delete" />
	</c:if>

    public GroupService() {
        // Default constructor
    }

    /**
     * Retrieves a paginated list of groups based on the provided pager criteria.
     * Updates the pager with pagination information including page numbers and ranges.
     *
     * @param groupPager the pager containing pagination and search criteria
     * @return a list of groups matching the criteria
     */

-left-radius:.25rem}.page-item:last-child .page-link{border-top-right-radius:.25rem;border-bottom-right-radius:.25rem}.page-item.active .page-link{z-index:3;color:#fff;background-color:#007bff;border-color:#007bff}.page-item.disabled .page-link{color:#6c757d;pointer-events:none;cursor:auto;background-color:#fff;border-color:#dee2e6}.pagination-lg .page-link{padding:.75rem 1.5rem;font-size:1.25rem;line-height:1.5}.pagination-lg .page-item:first-child .page-link{border-top-left-radius:.3rem;border...

<%@page pageEncoding="UTF-8" contentType="text/html; charset=UTF-8"%>
<ol class="breadcrumb float-sm-right">
	<c:if test="${crudMode == null}">
		<li class="breadcrumb-item active"><la:message key="labels.crud_link_list" /></li>
	</c:if>
	<c:if test="${crudMode != null}">
		<li class="breadcrumb-item"><la:link href="../list">
				<la:message key="labels.crud_link_list" />
			</la:link></li>
	</c:if>
	<c:if test="${crudMode == 1}">

<%@page pageEncoding="UTF-8" contentType="text/html; charset=UTF-8"%>
<script src="${fe:url('/js/admin/jquery-3.7.1.min.js')}" type="text/javascript"></script>
<script src="${fe:url('/js/admin/popper.min.js')}" type="text/javascript"></script>
<script src="${fe:url('/js/admin/bootstrap.min.js')}" type="text/javascript"></script>
<script src="${fe:url('/js/admin/moment-with-locales.min.js')}" type="text/javascript"></script>

    /**
     * Returns the start position.
     *
     * @return The start position.
     */
    public abstract int getStartPosition();

    /**
     * Returns the page size.
     *
     * @return The page size.
     */
    public abstract int getPageSize();

    /**
     * Returns the offset.
     *
     * @return The offset.
     */
    public abstract int getOffset();

        if (maxPageSize * 2 < windowSize) {
            logger.warn("rank.fusion.window_size is lower than paging.search.page.max.size. "
                    + "The window size should be 2x more than the page size. ({} * 2 <= {})", maxPageSize, windowSize);
            this.windowSize = 2 * maxPageSize;
        } else {
            this.windowSize = windowSize;
        }

    //                                                                      ==============

    /**
     * Handles user logout and redirects to the login page.
     *
     * @return the HTML response after logout
     */
    @Execute
    public HtmlResponse index() {
        final OptionalThing<FessUserBean> userBean = getUserBean();
        activityHelper.logout(userBean);

<%@page pageEncoding="UTF-8" contentType="text/html; charset=UTF-8"%>
<meta content='width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no' name='viewport'>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<link href="${fe:url('/css/admin/bootstrap.min.css')}" rel="stylesheet" type="text/css" />
<link href="${fe:url('/css/admin/font-awesome.min.css')}" rel="stylesheet" type="text/css" />

Mas primeiro, vamos verificar alguns pequenos conceitos.

## Está com pressa?

Se você não se importa com qualquer um desses termos e só precisa adicionar segurança com autenticação baseada em usuário e senha _agora_, pule para os próximos capítulos.

## OAuth2

OAuth2 é uma especificação que define várias formas para lidar com autenticação e autorização.

Ela é bastante extensiva na especificação e cobre casos de uso muito complexos.