return nil, err
	}

	m.Range(func(user string, mappedPolicy MappedPolicy) bool {
		if userPredicate != nil && !userPredicate(user) {
			return true
		}
		stsMap[user] = mappedPolicy.Policies
		return true
	})

	for user := range store.getParentUsers(cache) {
		if _, ok := stsMap[user]; !ok {
			if userPredicate != nil && !userPredicate(user) {
				continue
			}
			stsMap[user] = ""

	userIdentities := make([]UserIdentity, len(users))
	g := errgroup.WithNErrs(len(users))

	for index := range users {
		g.Go(func() error {
			userName := path.Dir(users[index])
			user, err := iamOS.loadUserIdentity(ctx, userName, userType)
			if err != nil && !errors.Is(err, errNoSuchUser) {
				return fmt.Errorf("unable to load the user `%s`: %w", userName, err)

Esto será especialmente útil cuando lo uses en una **gran base de código** donde uses **las mismas dependencias** una y otra vez en **muchas *path operations***.

## Usar `async` o no usar `async`

But in this case, the same **FastAPI** application will handle the API and the authentication.

So, let's review it from that simplified point of view:

* The user types the `username` and `password` in the frontend, and hits `Enter`.

)

func TestDistinct(t *testing.T) {
	users := []User{
		*GetUser("distinct", Config{}),
		*GetUser("distinct", Config{}),
		*GetUser("distinct", Config{}),
		*GetUser("distinct-2", Config{}),
		*GetUser("distinct-3", Config{}),
	}
	users[0].Age = 20

	if err := DB.Create(&users).Error; err != nil {
		t.Fatalf("errors happened when create users: %v", err)
	}

	var names []string

	if err := tx.First(&User{}, "name = ?", user.Name).Error; err != nil {
		t.Fatalf("Should find saved record")
	}

	if err := tx.SavePoint("save_point1").Error; err != nil {
		t.Fatalf("Failed to save point, got error %v", err)
	}

	user1 := *GetUser("transaction-save-point-1", Config{})
	tx.Create(&user1)

	if err := tx.First(&User{}, "name = ?", user1.Name).Error; err != nil {

							},
						},
					},
				},
			},
			"SELECT * FROM `users` INNER JOIN `articles` ON `articles`.`id` = `users`.`id`", nil,
		},
		{
			[]clause.Interface{
				clause.Select{}, clause.From{
					Tables: []clause.Table{{Name: "users"}},
					Joins: []clause.Join{
						{
							Type:  clause.RightJoin,
							Table: clause.Table{Name: "profiles"},

## Получение данных пользователя

`get_current_user` будет использовать созданную нами (ненастоящую) служебную функцию, которая принимает токен в виде `строки` и возвращает нашу Pydantic-модель `User`:

{* ../../docs_src/security/tutorial002_an_py310.py hl[19:22,26:27] *}

## Внедрение зависимости текущего пользователя

		case len(entities.UserMappings) != 1:
			c.Fatalf("Expected to find exactly one user mapping")
		case entities.UserMappings[0].User != testCase.expectedOutDN:
			c.Fatalf("Expected user DN `%s`, found `%s`", testCase.expectedOutDN, entities.UserMappings[0].User)
		case len(entities.UserMappings[0].Policies) != 1:
			c.Fatalf("Expected exactly one policy attached to user")
		case entities.UserMappings[0].Policies[0] != policy:

```Python hl_lines="1  3" title="app/routers/users.py"
{!../../docs_src/bigger_applications/app/routers/users.py!}
```

### *Path operations* con `APIRouter`

Y luego lo usas para declarar tus *path operations*.

Úsalo de la misma manera que usarías la clase `FastAPI`:

```Python hl_lines="6  11  16" title="app/routers/users.py"
{!../../docs_src/bigger_applications/app/routers/users.py!}
```