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

{* ../../docs_src/request_forms/tutorial001_an_py39.py hl[9] *}

For example, in one of the ways the OAuth2 specification can be used (called "password flow") it is required to send a `username` and `password` as form fields.

The <abbr title="specification">spec</abbr> requires the fields to be exactly named `username` and `password`, and to be sent as form fields, not JSON.

```

다음과 같은 결과를 생성합니다:

```Python
UserInDB(
    username="john",
    password="secret",
    email="******@****.***",
    full_name=None,
)
```

혹은 더 정확히 말하자면, `user_dict`를 직접 사용하는 것은, 나중에 어떤 값이 추가되더라도 아래와 동일한 효과를 냅니다:

```Python
UserInDB(
    username = user_dict["username"],
    password = user_dict["password"],
    email = user_dict["email"],
    full_name = user_dict["full_name"],
)
```

)

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"

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"
  }

        TermQueryBuilder builder = regTermQ("password", password);
        if (opLambda != null) {
            opLambda.callback(builder);
        }
    }

    public void setPassword_NotEqual(String password) {
        setPassword_NotTerm(password, null);
    }

    public void setPassword_NotTerm(String password) {
        setPassword_NotTerm(password, null);

                    final String password = auth.getPassword();
                    lmHash = new byte[0];
                    ntHash = new byte[(password.length() + 1) * 2];
                    writeString(password, ntHash, 0);
                } else {
                    // plain text
                    final String password = auth.getPassword();
                    lmHash = new byte[(password.length() + 1) * 2];

    #   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_py39.py hl[1,12:24] *}

Esto sería similar a:

```Python

     * @param domain the domain for authentication
     * @param username the username for authentication
     * @param password the password for authentication
     */
    public JAASAuthenticator(String serviceName, String domain, String username, String password) {
        super(null, domain, username, password);
        this.serviceName = serviceName;
    }

    /**
     * Create an authenticator using the given credentials