object Credentials {
  /** Returns an auth credential for the Basic scheme. */
  @JvmStatic @JvmOverloads
  fun basic(
    username: String,
    password: String,
    charset: Charset = ISO_8859_1,
  ): String {
    val usernameAndPassword = "$username:$password"
    val encoded = usernameAndPassword.encode(charset).base64()
    return "Basic $encoded"
  }

		ACB_SVRTRUST               = 0x00000100, /* 1 = Server trust account */
		ACB_PWNOEXP                = 0x00000200, /* 1 = User password does not expire */
		ACB_AUTOLOCK               = 0x00000400, /* 1 = Account auto locked */
		ACB_ENC_TXT_PWD_ALLOWED    = 0x00000800, /* 1 = Encryped text password is allowed */
		ACB_SMARTCARD_REQUIRED     = 0x00001000, /* 1 = Smart Card required */

)

var DB *gorm.DB
var (
	mysqlDSN     = "gorm:gorm@tcp(localhost:9910)/gorm?charset=utf8&parseTime=True&loc=Local"
	postgresDSN  = "user=gorm password=gorm dbname=gorm host=localhost port=9920 sslmode=disable TimeZone=Asia/Shanghai"
	gaussdbDSN   = "user=gaussdb password=Gaussdb@123 dbname=gorm host=localhost port=9950 sslmode=disable TimeZone=Asia/Shanghai"
	sqlserverDSN = "sqlserver://sa:LoremIpsum86@localhost:9930?database=master"

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

     *
     * @return default credentials, user name
     */
    String getDefaultUsername();

    /**
     *
     * Property {@code jcifs.smb.client.password}
     *
     * @return default credentials, password
     */
    String getDefaultPassword();

    /**
     * Lanman compatibility level
     *

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