### Anwendungsfälle: Externer Service

Ein Beispiel könnte sein, dass Sie einen externen Authentifizierungsanbieter haben, mit dem Sie sich verbinden müssen.

Sie senden ihm ein Token und er gibt einen authentifizierten Benutzer zurück.

Dieser Anbieter berechnet Ihnen möglicherweise Gebühren pro Anfrage, und der Aufruf könnte etwas länger dauern, als wenn Sie einen vordefinierten Scheinbenutzer für Tests hätten.

### Casos de uso: serviço externo

Um exemplo pode ser que você possua um provedor de autenticação externo que você precisa chamar.

Você envia ao serviço um *token* e ele retorna um usuário autenticado.

Este provedor pode cobrar por requisição, e chamá-lo pode levar mais tempo do que se você tivesse um usuário fixo para os testes.

👥 🔜 🔌 👉 `APIRouter` 👑 `FastAPI` 📱, ✋️ 🥇, ➡️ ✅ 🔗 & ➕1️⃣ `APIRouter`.

## 🔗

👥 👀 👈 👥 🔜 💪 🔗 ⚙️ 📚 🥉 🈸.

👥 🚮 👫 👫 👍 `dependencies` 🕹 (`app/dependencies.py`).

👥 🔜 🔜 ⚙️ 🙅 🔗 ✍ 🛃 `X-Token` 🎚:

```Python hl_lines="1  4-6" title="app/dependencies.py"
{!../../docs_src/bigger_applications/app/dependencies.py!}
```

/// tip

👥 ⚙️ 💭 🎚 📉 👉 🖼.

                                    <tr>
                                        <th><la:message
                                                key="labels.access_token_token"/></th>
                                        <td>${f:h(token)}</td>
                                    </tr>
                                    <tr>
                                        <th><la:message key="labels.permissions"/></th>

    // Patterns for sensitive data - compiled once and cached
    private static final Pattern PASSWORD_PATTERN = Pattern.compile(
            "(?i)(password|passwd|pwd|secret|token|key|credential|auth)([\"']?\\s*[:=]\\s*[\"']?)([^\"',\\s]+)", Pattern.CASE_INSENSITIVE);

    private static final Pattern IP_PATTERN = Pattern.compile("\\b(?:[0-9]{1,3}\\.){3}[0-9]{1,3}\\b");

        assertTrue(ex.getMessage().contains("ExtendedGSSContext is not implemented"));
    }

    @Test
    @DisplayName("initSecContext returns token and verifies interaction")
    void initSecContext_success() throws Exception {
        byte[] in = new byte[] { 10, 11 };
        byte[] out = new byte[] { 12, 13, 14 };

	}

	if subtle.ConstantTimeCompare([]byte(resp.Header.Get(xhttp.AmzRequestToken)), []byte(eventData.GetObjectContext.OutputToken)) != 1 {
		tokenErr := errorCodes.ToAPIErr(ErrInvalidToken)
		tokenErr.Description = "The request token included in the request is invalid"
		writeErrorResponse(ctx, w, tokenErr, r.URL)
		return
	}

	statusCode := resp.StatusCode
	if status := resp.Header.Get(xhttp.AmzFwdStatus); status != "" {

create a presigned URL and serve to the client for each file. Since, the client would have the session it can do it by itself.

The temporary security credentials returned by this API consists of an access key, a secret key, and a security token. Applications can use these temporary security credentials to sign calls to MinIO API operations. The policy applied to these temporary credentials is inherited from the MinIO user credentials. By default, the temporary security credentials created...

### Casos de uso: servicio externo

Un ejemplo podría ser que tienes un proveedor de autenticación externo al que necesitas llamar.

Le envías un token y te devuelve un usuario autenticado.

Este proveedor podría estar cobrándote por cada request, y llamarlo podría tomar más tiempo adicional que si tuvieras un usuario de prueba fijo para los tests.

            String value = (String) provide.getValue();

            if (value == null) {
                throw new MisconfiguredToolchainException(
                        "Provides token '" + key + "' doesn't have any value configured.");
            }

            RequirementMatcher matcher;
            if ("version".equals(key)) {