available, instead of erroring out, the dependency result will be
                `None`.

                This is useful when you want to have optional authentication.

                It is also useful when you want to have authentication that can be
                provided in one of multiple optional ways (for example, in a query
                parameter or in an HTTP Bearer token).
                """
            ),

            }
        }
    }

    private Authentication getAuthentication(AuthenticationSelector selector, ArtifactRepository repository) {
        if (selector != null) {
            RemoteRepository repo = RepositoryUtils.toRepo(repository);
            org.eclipse.aether.repository.Authentication auth = selector.getAuthentication(repo);
            if (auth != null) {

        repositorySystem.injectAuthentication(Arrays.asList(repository), Arrays.asList(server));
        Authentication authentication = repository.getAuthentication();
        assertNotNull(authentication);
        assertEquals("jason", authentication.getUsername());
        assertEquals("abc123", authentication.getPassword());
    }

                This is useful when you want to have optional authentication.

                It is also useful when you want to have authentication that can be
                provided in one of multiple optional ways (for example, in HTTP Basic
                authentication or in an HTTP Bearer token).
                """
            ),
        ] = True,
    ):

```

Refer [Prometheus documentation](https://prometheus.io/docs/introduction/first_steps/) for more details.

### 2. Configure authentication type for Prometheus metrics

MinIO supports two authentication modes for Prometheus either `jwt` or `public`, by default MinIO runs in `jwt` mode. To allow public access without authentication for prometheus metrics set environment as follows.

```
export MINIO_PROMETHEUS_AUTH_TYPE="public"
minio server ~/test

::: fastapi.security.APIKeyHeader

::: fastapi.security.APIKeyQuery

## HTTP Authentication Schemes

::: fastapi.security.HTTPBasic

::: fastapi.security.HTTPBearer

::: fastapi.security.HTTPDigest

## HTTP Credentials

::: fastapi.security.HTTPAuthorizationCredentials

::: fastapi.security.HTTPBasicCredentials

## OAuth2 Authentication

::: fastapi.security.OAuth2

	errAccessKeyDisabled  = errors.New("The access key you provided is disabled")
	errAuthentication     = errors.New("Authentication failed, check your access credentials")
	errNoAuthToken        = errors.New("JWT token missing")
	errSkewedAuthTime     = errors.New("Skewed authentication date/time")
	errMalformedAuth      = errors.New("Malformed authentication input")
)

type cacheKey struct {
	accessKey, secretKey, audience string
}

    }
    for (i in 0 until methodCount) {
      val candidateMethod: Int = fromSource.readByte() and 0xff
      if (candidateMethod == METHOD_NO_AUTHENTICATION_REQUIRED) {
        selectedMethod = candidateMethod
      }
    }
    when (selectedMethod) {
      METHOD_NO_AUTHENTICATION_REQUIRED -> {
        fromSink.writeByte(VERSION_5)
        fromSink.writeByte(selectedMethod)
        fromSink.emit()
      }

You can import it directly from `fastapi`:

```python
from fastapi import Depends
```

::: fastapi.Depends

## `Security()`

For many scenarios, you can handle security (authorization, authentication, etc.) with dependencies, using `Depends()`.

But when you want to also declare OAuth2 scopes, you can use `Security()` instead of `Depends()`.

You can import `Security()` directly from `fastapi`:

```python

# We set up anonymous authentication as this is for demos.
auth:
  strategy: anonymous
deployment:
  pod_labels:
    sidecar.istio.io/inject: "false"
  accessible_namespaces:
  - '**'
  ingress_enabled: false
login_token:
  signing_key: CHANGEME00000000
external_services:
  # Kiali will not start up without tracing service. We don't want to require it.
  tracing: