public OAuthSession exchangeCode(String code, HttpUrl redirectUrl) throws IOException {
    HttpUrl url = baseUrl.newBuilder("oauth.access")
        .addQueryParameter("client_id", clientId)
        .addQueryParameter("client_secret", clientSecret)
        .addQueryParameter("code", code)
        .addQueryParameter("redirect_uri", redirectUrl.toString())
        .build();
    Request request = new Request.Builder()
        .url(url)

```

Set `identity_openid` config with `config_url`, `client_id` and restart MinIO

```
~ mc admin config set myminio identity_openid config_url="http://CASDOOR_ENDPOINT/.well-known/openid-configuration" client_id=<client id> client_secret=<client secret> claim_name="tag"
```

> NOTE: As MinIO needs to use a claim attribute in JWT for its policy, you should configure it in casdoor as well. Currently, casdoor uses `tag` as a workaround for configuring MinIO's policy.

                                "title": "Client Id",
                                "anyOf": [{"type": "string"}, {"type": "null"}],
                            },
                            "client_secret": {
                                "title": "Client Secret",
                                "anyOf": [{"type": "string"}, {"type": "null"}],
                                "format": "password",

                        "client_id": {
                            "title": "Client Id",
                            "anyOf": [{"type": "string"}, {"type": "null"}],
                        },
                        "client_secret": {
                            "title": "Client Secret",
                            "anyOf": [{"type": "string"}, {"type": "null"}],
                            "format": "password",
                        },

Если вам нужно это строгое требование, используйте `OAuth2PasswordRequestFormStrict` вместо `OAuth2PasswordRequestForm`.
///

* Необязательное поле `client_id` (в нашем примере оно не нужно).
* Необязательное поле `client_secret` (в нашем примере оно не нужно).

/// info | Дополнительная информация
`OAuth2PasswordRequestForm` — это не специальный класс для **FastAPI**, как `OAuth2PasswordBearer`.

Wenn Sie es erzwingen müssen, verwenden Sie `OAuth2PasswordRequestFormStrict` anstelle von `OAuth2PasswordRequestForm`.

///

* Eine optionale `client_id` (benötigen wir für unser Beispiel nicht).
* Ein optionales `client_secret` (benötigen wir für unser Beispiel nicht).

/// info | Info

`OAuth2PasswordRequestForm` ist keine spezielle Klasse für **FastAPI**, so wie `OAuth2PasswordBearer`.

If you need to enforce it, use `OAuth2PasswordRequestFormStrict` instead of `OAuth2PasswordRequestForm`.

///

* An optional `client_id` (we don't need it for our example).
* An optional `client_secret` (we don't need it for our example).

/// info

The `OAuth2PasswordRequestForm` is not a special class for **FastAPI** as is `OAuth2PasswordBearer`.

Si necesitas imponerlo, utiliza `OAuth2PasswordRequestFormStrict` en lugar de `OAuth2PasswordRequestForm`.

///

* Un `client_id` opcional (no lo necesitamos para nuestro ejemplo).
* Un `client_secret` opcional (no lo necesitamos para nuestro ejemplo).

/// info | Información

`OAuth2PasswordRequestForm` no es una clase especial para **FastAPI** como lo es `OAuth2PasswordBearer`.

                .setGrantType("authorization_code")//
                .setRedirectUri(getOicRedirectUrl())//
                .set("client_id", getOicClientId())//
                .set("client_secret", getOicClientSecret())//
                .execute();
    }

    /**
     * Gets the OpenID Connect client secret.
     *
     * @return the client secret
     */

实际上，OAuth2 规范*要求* `grant_type` 字段使用固定值 `password`，但 `OAuth2PasswordRequestForm` 没有作强制约束。

如需强制使用固定值 `password`，则不要用 `OAuth2PasswordRequestForm`，而是用 `OAuth2PasswordRequestFormStrict`。

///

* 可选的 `client_id`（本例未使用）
* 可选的 `client_secret`（本例未使用）

/// info | 说明

`OAuth2PasswordRequestForm` 与 `OAuth2PasswordBearer` 一样，都不是 FastAPI 的特殊类。

**FastAPI** 把 `OAuth2PasswordBearer` 识别为安全方案。因此，可以通过这种方式把它添加至 OpenAPI。