@ValueSource(strings = { "user", "user123", "user.name", "user-name", "user_name", "user@domain.com" })
    void testValidUsernames(String username) {
        assertDoesNotThrow(() -> InputValidator.validateUsername(username));
    }

    @ParameterizedTest
    @DisplayName("Test invalid usernames")
    @ValueSource(strings = { "user name", // space
            "user#name", // invalid character

    /**
     * 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);
        final String redirectUrl = userBean.map(user -> ComponentUtil.getSsoManager().logout(user)).orElse(null);
        fessLoginAssist.logout();

    * Normally, a token is set to expire after some time.
        * So, the user will have to log in again at some point later.
        * And if the token is stolen, the risk is less. It is not like a permanent key that will work forever (in most of the cases).
* The frontend stores that token temporarily somewhere.

    return user_id


# A Pydantic model
class User(BaseModel):
    id: int
    name: str
    joined: date
```

که سپس میتوان به این شکل از آن استفاده کرد:

```Python
my_user: User = User(id=3, name="John Doe", joined="2018-07-19")

second_user_data = {
    "id": 4,
    "name": "Mary",
    "joined": "2018-11-30",
}

my_second_user: User = User(**second_user_data)
```

/// info

    private int pageSize;

    /** Current page number */
    private int currentPageNumber;

    /** User ID for search filtering */
    public String id;

    /** User name for search filtering */
    public String name;

    /** User roles for search filtering */
    public String[] roles;

    /** User groups for search filtering */
    public String[] groups;

    /** Version number for optimistic locking */

				</ul></li></c:if>
						
			<c:if test="${fe:permission('admin-user-view') or fe:permission('admin-role-view') or fe:permission('admin-group-view')}">
			<li class="nav-item has-treeview <c:if test="${param.menuCategoryType=='user'}">menu-open</c:if>">
				<a href="#" class="nav-link <c:if test="${param.menuCategoryType=='user'}">active</c:if>">
					<em class='nav-icon fa fa-user'>
					<p>
						<la:message key="labels.menu_user" />

type User struct {
	gorm.Model
	Name      string
	Age       uint
	Birthday  *time.Time
	Account   Account
	Pets      []*Pet
	NamedPet  *Pet
	Toys      []Toy   `gorm:"polymorphic:Owner"`
	Tools     []Tools `gorm:"polymorphicType:Type;polymorphicId:CustomID"`
	CompanyID *int
	Company   Company
	ManagerID *uint
	Manager   *User
	Team      []User     `gorm:"foreignkey:ManagerID"`

                localLogMsg.get());

        activityHelper.login(createUser("testuser", new String[0]));
        assertEquals(

    }

    @Override
    public Settings buildSettings() throws IOException, XmlPullParserException {
        File userSettingsFile = getFile(
                "${user.home}/.m2/settings.xml", "user.home", MavenSettingsBuilder.ALT_USER_SETTINGS_XML_LOCATION);

        return buildSettings(userSettingsFile);
    }

    @Override

import org.dbflute.optional.OptionalThing;

/**
 * An LDAP user.
 */
public class LdapUser implements FessUser {

    private static final long serialVersionUID = 1L;

    /** The environment for LDAP connection. */
    protected Hashtable<String, String> env;

    /** The name of the user. */
    protected String name;

    /** The permissions of the user. */
    protected String[] permissions = null;

    /**