"operationId": "read_users_me_users_me_get",
                    "security": [{"OAuth2PasswordBearer": []}],
                }
            }
        },
        "components": {
            "securitySchemes": {
                "OAuth2PasswordBearer": {
                    "type": "oauth2",
                    "flows": {"password": {"scopes": {}, "tokenUrl": "token"}},
                }

from fastapi import Depends, FastAPI
from fastapi.security import OAuth2PasswordBearer

app = FastAPI()

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")


@app.get("/items/")
async def read_items(token: str = Depends(oauth2_scheme)):

from typing import Annotated, Union

from fastapi import Depends, FastAPI
from fastapi.security import OAuth2PasswordBearer
from pydantic import BaseModel

app = FastAPI()

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")


class User(BaseModel):
    username: str
    email: Union[str, None] = None
    full_name: Union[str, None] = None
    disabled: Union[bool, None] = None


def fake_decode_token(token):

from .http import HTTPDigest as HTTPDigest
from .oauth2 import OAuth2 as OAuth2
from .oauth2 import OAuth2AuthorizationCodeBearer as OAuth2AuthorizationCodeBearer
from .oauth2 import OAuth2PasswordBearer as OAuth2PasswordBearer
from .oauth2 import OAuth2PasswordRequestForm as OAuth2PasswordRequestForm
from .oauth2 import OAuth2PasswordRequestFormStrict as OAuth2PasswordRequestFormStrict
from .oauth2 import SecurityScopes as SecurityScopes

## **FastAPI**'s `OAuth2PasswordBearer` { #fastapis-oauth2passwordbearer }

**FastAPI** provides several tools, at different levels of abstraction, to implement these security features.

In this example we are going to use **OAuth2**, with the **Password** flow, using a **Bearer** token. We do that using the `OAuth2PasswordBearer` class.

/// info

A "bearer" token is not the only option.

                            }
                        },
                        "summary": "Read Users Me",
                        "operationId": "read_users_me_users_me__get",
                        "security": [{"OAuth2PasswordBearer": ["me"]}],
                    }
                },
                "/users/me/items/": {
                    "get": {
                        "responses": {
                            "200": {

from typing import Annotated

from fastapi import Depends, FastAPI, HTTPException, status
from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
from pydantic import BaseModel

fake_users_db = {
    "johndoe": {
        "username": "johndoe",
        "full_name": "John Doe",
        "email": "******@****.***",
        "hashed_password": "fakehashedsecret",
        "disabled": False,
    },
    "alice": {

    APIKeyHeader,
    APIKeyQuery,
    HTTPAuthorizationCredentials,
    HTTPBasic,
    HTTPBasicCredentials,
    HTTPBearer,
    HTTPDigest,
    OAuth2,
    OAuth2AuthorizationCodeBearer,
    OAuth2PasswordBearer,
    OAuth2PasswordRequestForm,
    OAuth2PasswordRequestFormStrict,
    OpenIdConnect,
    SecurityScopes,
)
```

## API Key Security Schemes

::: fastapi.security.APIKeyCookie

from typing import Annotated, Union

from fastapi import FastAPI, HTTPException, Security
from fastapi.security import (
    OAuth2PasswordBearer,
    SecurityScopes,
)
from fastapi.testclient import TestClient

app = FastAPI()

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")


def process_auth(
    credentials: Annotated[Union[str, None], Security(oauth2_scheme)],
    security_scopes: SecurityScopes,
):

## Класс `OAuth2PasswordBearer` в **FastAPI** { #fastapis-oauth2passwordbearer }

**FastAPI** предоставляет несколько средств на разных уровнях абстракции для реализации этих функций безопасности.

В этом примере мы будем использовать **OAuth2**, с потоком **Password**, используя токен **Bearer**. Для этого мы используем класс `OAuth2PasswordBearer`.

/// info | Дополнительная информация