Por ejemplo, en una de las formas en las que se puede usar la especificación OAuth2 (llamada "password flow") se requiere enviar un `username` y `password` como campos de formulario.

La <dfn title="especificación">especificación</dfn> requiere que los campos se llamen exactamente `username` y `password`, y que se envíen como campos de formulario, no JSON.

以與 `Body` 或 `Query` 相同的方式建立表單參數：

{* ../../docs_src/request_forms/tutorial001_an_py310.py hl[9] *}

例如，在 OAuth2 規範的一種用法（稱為「password flow」）中，必須以表單欄位傳送 `username` 與 `password`。

該 <dfn title="規範">規範</dfn> 要求欄位名稱必須正好是 `username` 和 `password`，而且必須以表單欄位傳送，而不是 JSON。

使用 `Form` 時，你可以宣告與 `Body`（以及 `Query`、`Path`、`Cookie`）相同的設定，包括驗證、範例、別名（例如用 `user-name` 取代 `username`）等。

/// info

labels.suggestWord=Parola suggerita
labels.targetLabel=Etichetta
labels.term=Termine di ricerca
labels.fields=Campi
labels.ex_q=Query estesa
labels.oldPassword=Password attuale
labels.newPassword=Nuova password
labels.confirmNewPassword=Conferma nuova password

labels.menu_system=Sistema
labels.menu_wizard=Procedura guidata
labels.menu_crawl_config=Generale
labels.menu_scheduler_config=Pianificatore

    #   o user: The database user name. (Required)
    #   o password: The database password. (NotRequired - Default '')
    #
    #; schemaSyncCheckMap = map:{
    #    ; url = jdbc:...
    #    ; schema = EXAMPLEDB
    #    ; user = exampuser
    #    ; password = exampword
    #}
    # - - - - - - - - - -/

Para manejar eso, primero convertimos el `username` y `password` a `bytes` codificándolos con UTF-8.

Luego podemos usar `secrets.compare_digest()` para asegurar que `credentials.username` es `"stanleyjobson"`, y que `credentials.password` es `"swordfish"`.

{* ../../docs_src/security/tutorial007_an_py310.py hl[1,12:24] *}

Esto sería similar a:

```Python

from fastapi import FastAPI
from pydantic import BaseModel, EmailStr

app = FastAPI()


class UserIn(BaseModel):
    username: str
    password: str
    email: EmailStr
    full_name: str | None = None


class UserOut(BaseModel):
    username: str
    email: EmailStr
    full_name: str | None = None


class UserInDB(BaseModel):
    username: str
    hashed_password: str
    email: EmailStr

from fastapi import FastAPI
from fastapi.testclient import TestClient
from pydantic import BaseModel

app = FastAPI()


class UserCreate(BaseModel):
    email: str
    password: str


class UserDB(BaseModel):
    email: str
    hashed_password: str


class User(BaseModel):
    email: str


class PetDB(BaseModel):
    name: str
    owner: UserDB


class PetOut(BaseModel):
    name: str

	HelpPostgres = config.HelpKVS{
		config.HelpKV{
			Key:         target.PostgresConnectionString,
			Description: `Postgres server connection-string e.g. "host=localhost port=5432 dbname=minio_events user=postgres password=password sslmode=disable"`,
			Type:        "string",
			Sensitive:   true,
		},
		config.HelpKV{
			Key:         target.PostgresTable,
			Description: "DB table name to store/update events, table is auto-created",

{* ../../docs_src/request_forms/tutorial001_an_py310.py hl[9] *}

Örneğin OAuth2 spesifikasyonunun kullanılabileceği ("password flow" olarak adlandırılan) yollardan birinde, form alanları olarak bir `username` ve `password` göndermek zorunludur.

<dfn title="spesifikasyon">Spesifikasyon</dfn>, alanların adının tam olarak `username` ve `password` olmasını ve JSON değil form alanları olarak gönderilmesini gerektirir.

        ComponentUtil.getLdapManager().delete(user);
    }

    @Override
    public boolean changePassword(final String username, final String password) {
        final boolean changed = ComponentUtil.getLdapManager().changePassword(username, password);
        return !changed || ComponentUtil.getFessConfig().isLdapAdminSyncPassword();
    }

    @Override
    public User load(final User user) {