## **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

 *
 * This class contains a Kotlin implementation of the pseudocode specified by RFC 3492. It includes
 * direct translation of the pseudocode presented there.
 *
 * Partner this class with [UTS #46] to implement IDNA2008 [RFC 5890] like most browsers do.
 *
 * [RFC 3492]: https://datatracker.ietf.org/doc/html/rfc3492
 * [RFC 5890]: https://datatracker.ietf.org/doc/html/rfc5890
 * [UTS #46]: https://www.unicode.org/reports/tr46/
 */

Framing rules make it impractical to implement http/2 correctly on a single blocking thread. The flow-control features introduce feedback between reads and writes, requiring writes to acknowledge reads and reads to throttle writes.

        @Test
        @DisplayName("Should implement NegotiateContextRequest interface")
        void testImplementsNegotiateContextRequest() {
            PreauthIntegrityNegotiateContext context = new PreauthIntegrityNegotiateContext();

            assertTrue(context instanceof NegotiateContextRequest);
        }

        @Test
        @DisplayName("Should implement NegotiateContextResponse interface")

        }
    }

    @Nested
    @DisplayName("Interface Tests")
    class InterfaceTest {

        @Test
        @DisplayName("Should implement NegotiateContextResponse interface correctly")
        void testInterfaceImplementation() {
            // Arrange
            NegotiateContextResponse preauthContext = new PreauthIntegrityNegotiateContext();

- Implement a queueing hint for PersistentVolumeClaim/Add event in CSILimit plugin. ([#124703](https://github.com/kubernetes/kubernetes/pull/124703), [@utam0k](https://github.com/utam0k)) [SIG Scheduling and Storage]

 * states it cannot ever leave them.
 *
 * <p>Implementors of this interface are strongly encouraged to extend one of the abstract classes
 * in this package which implement this interface and make the threading and state management
 * easier.
 *
 * @author Jesse Wilson
 * @author Luke Sandberg
 * @since 9.0 (in 1.0 as {@code com.google.common.base.Service})
 */

You will get an "Inactive user" error, like:

```JSON
{
  "detail": "Inactive user"
}
```

## Recap { #recap }

You now have the tools to implement a complete security system based on `username` and `password` for your API.

Using these tools, you can make the security system compatible with any database and with any user or data model.

unauthorized access to data or models, but also to prevent malicious users or
tenants sending graphs to execute under another tenant’s identity.

The isolation mechanisms are the responsibility of the users to design and
implement, and therefore security issues deriving from their absence are not
considered a vulnerability in TensorFlow.

### Resource allocation

A denial of service caused by one model could bring down the entire server, but

        int cmd2 = (int) commandField.get(req2);

        assertEquals(cmd1, cmd2);
        assertEquals(SMB2_TREE_DISCONNECT, cmd1);
    }

    @Test
    @DisplayName("Should properly implement wire format protocol")
    void testWireFormatProtocol() {
        // Given
        Configuration mockConfig = mock(Configuration.class);
        Smb2TreeDisconnectRequest request = new Smb2TreeDisconnectRequest(mockConfig);