Prefer to use the `Annotated` version if possible.

///

```Python hl_lines="7-9  13"
{!> ../../docs_src/request_form_models/tutorial001.py!}
```

////

**FastAPI** will **extract** the data for **each field** from the **form data** in the request and give you the Pydantic model you defined.

## Check the Docs

You can verify it in the docs UI at `/docs`:

<div class="screenshot">

app = FastAPI()


class FormData(BaseModel):
    username: str
    password: str

    class Config:
        extra = "forbid"


@app.post("/login/")
async def login(data: FormData = Form()):

                                </h3>
                            </div>
                            <div class="card-footer">
                                <button type="button" class="btn btn-danger" data-toggle="modal" data-target="#confirmToClearCrawlerIndex">
                                    <em class="fa fa-trash">
                                    <la:message key="labels.clear_crawler_index_button"/>

app = FastAPI()


class FormData(BaseModel):
    username: str
    password: str
    model_config = {"extra": "forbid"}


@app.post("/login/")
async def login(data: Annotated[FormData, Form()]):

app = FastAPI()


class FormData(BaseModel):
    username: str
    password: str
    model_config = {"extra": "forbid"}


@app.post("/login/")
async def login(data: Annotated[FormData, Form()]):

```

Then load the policy via OPA's REST API.

```
curl -X PUT --data-binary @example.rego \
  localhost:8181/v1/policies/putobject
```

### 4. Setup MinIO with OPA

Set the `MINIO_POLICY_PLUGIN_URL` as the endpoint that MinIO should send authorization requests to. Then start the server.

```sh
export MINIO_POLICY_PLUGIN_URL=http://localhost:8181/v1/data/httpapi/authz/allow
export MINIO_CI_CD=1
export MINIO_ROOT_USER=minio

docs:
  - all:
    - changed-files:
      - any-glob-to-any-file:
        - docs/en/docs/**
        - docs_src/**
      - all-globs-to-all-files:
        - '!fastapi/**'
        - '!pyproject.toml'
        - '!docs/en/data/sponsors.yml'
        - '!docs/en/overrides/main.html'

lang-all:
  - all:
    - changed-files:
      - any-glob-to-any-file:
        - docs/*/docs/**
      - all-globs-to-all-files:

	"http://127.0.0.1:9004/tmp/multisiteb/data/disterasure/xl{5...8}" >/tmp/siteb_1.log 2>&1 &
minio server --address 127.0.0.1:9004 "http://127.0.0.1:9003/tmp/multisiteb/data/disterasure/xl{1...4}" \
	"http://127.0.0.1:9004/tmp/multisiteb/data/disterasure/xl{5...8}" >/tmp/siteb_2.log 2>&1 &

minio server --address 127.0.0.1:9005 "http://127.0.0.1:9005/tmp/multisitec/data/disterasure/xl{1...4}" \

                    </mxGeometry>
                </mxCell>

                                            <c:forEach var="data" varStatus="s"
                                                       items="${dataConfigItems}">
                                                <tr
                                                        data-href="${contextPath}/admin/dataconfig/details/4/${f:u(data.id)}">
                                                    <td>${f:h(data.name)}</td>