rootCAs    *x509.CertPool
	username   string
	password   string
}

// OperatorOption - functional options pattern style for OperatorDNS
type OperatorOption func(*OperatorDNS)

// Authentication - custom username and password for authenticating at the endpoint
func Authentication(username, password string) OperatorOption {
	return func(args *OperatorDNS) {
		args.username = username
		args.password = password
	}

	opts.Port = 14223
	opts.Username = "testminio"
	opts.Password = "miniotest"
	s := natsserver.RunServer(&opts)
	defer s.Shutdown()

	clientConfig := &NATSArgs{
		Enable: true,
		Address: xnet.Host{
			Name:      "localhost",
			Port:      (xnet.Port(opts.Port)),
			IsPortSet: true,
		},
		Subject:  "test",
		Username: opts.Username,
		Password: opts.Password,
	}

이를 처리하기 위해 먼저 `username`과 `password`를 UTF-8로 인코딩해서 `bytes`로 변환합니다.

그런 다음 `secrets.compare_digest()`를 사용해 `credentials.username`이 `"stanleyjobson"`이고 `credentials.password`가 `"swordfish"`인지 확실히 확인할 수 있습니다.

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

이는 다음과 비슷합니다:

```Python
if not (credentials.username == "stanleyjobson") or not (credentials.password == "swordfish"):

     * @param form the form containing the request header data
     * @param username the username of the user performing the operation
     * @param currentTime the current timestamp
     * @return optional entity containing the request header data, or empty if creation fails
     */
    public static OptionalEntity<RequestHeader> getEntity(final CreateForm form, final String username, final long currentTime) {
        switch (form.crudMode) {

     *
     * @param form the create form
     * @param username the current username
     * @param currentTime the current time
     * @return optional file authentication entity
     */
    public static OptionalEntity<FileAuthentication> getEntity(final CreateForm form, final String username, final long currentTime) {
        switch (form.crudMode) {
        case CrudMode.CREATE:

@app.get("/items/")
async def read_items():
    return [{"item": "Portal Gun"}, {"item": "Plumbus"}]


@app.get("/users/")
async def read_users():

	currTime := UTCNow()

	var (
		username = cred.AccessKey
		claims   = cred.Claims
		groups   = cred.Groups
	)

	if cred.IsTemp() || cred.IsServiceAccount() {
		// For derived credentials, check the parent user's permissions.
		username = cred.ParentUser
	}

	principalType := "Anonymous"
	if username != "" {
		principalType = "User"
		if len(claims) > 0 {

from pydantic import BaseModel

app = FastAPI()

api_key = APIKeyQuery(name="key", description="API Key Query")


class User(BaseModel):
    username: str


def get_current_user(oauth_header: str = Security(api_key)):
    user = User(username=oauth_header)
    return user


@app.get("/users/me")
def read_current_user(current_user: User = Depends(get_current_user)):
    return current_user

from pydantic import BaseModel

app = FastAPI()

api_key = APIKeyQuery(name="key", auto_error=False)


class User(BaseModel):
    username: str


def get_current_user(oauth_header: str | None = Security(api_key)):
    if oauth_header is None:
        return None
    user = User(username=oauth_header)
    return user


@app.get("/users/me")
def read_current_user(current_user: User | None = Depends(get_current_user)):

# パスワードとBearerによるシンプルなOAuth2 { #simple-oauth2-with-password-and-bearer }

前章から発展させて、完全なセキュリティフローに必要な不足部分を追加していきます。

## `username` と `password` を取得する { #get-the-username-and-password }

`username` と `password` を取得するために **FastAPI** のセキュリティユーティリティを使います。

OAuth2 では、「password flow」（ここで使用するフロー）を使う場合、クライアント/ユーザーはフォームデータとして `username` と `password` フィールドを送信する必要があります。

しかも、フィールド名はこの通りでなければなりません。つまり、`user-name` や `email` では動作しません。