But first, let's check some small concepts.

## In a hurry? { #in-a-hurry }

If you don't care about any of these terms and you just need to add security with authentication based on username and password *right now*, skip to the next chapters.

## OAuth2 { #oauth2 }

OAuth2 is a specification that defines several ways to handle authentication and authorization.

    checkNotNull(node, "node");

    NetworkConnections<N, E> connections = nodeConnections.get(node);
    if (connections == null) {
      return false;
    }

    // Since views are returned, we need to copy the edges that will be removed.
    // Thus we avoid modifying the underlying view while iterating over it.
    for (E edge : ImmutableList.copyOf(connections.incidentEdges())) {
      removeEdge(edge);
    }

        // Given
        Smb2EncryptionContext context = new Smb2EncryptionContext(1, DialectVersion.SMB311, testEncryptionKey, testDecryptionKey);

        // When - initially should not need rotation
        assertFalse(context.needsKeyRotation(), "Should not need rotation initially");

        // Note: We can't directly test the byte limit without encrypting large amounts of data,

 *   <li>file system errors: permissions</li>
 * </ul>
 *
 * TODO carlos: all these possible has*Exceptions and get*Exceptions methods make the clients too
 *       complex requiring a long list of checks, need to create a parent/interface/encapsulation
 *       for the types of exceptions
 */
@Deprecated
public class ArtifactResolutionResult {
    private static final String LS = System.lineSeparator();

    /**
     * The path separator.
     */
    private static final String PATH_SEP = System.getProperty("path.separator");

    static {
        // Those two public constants are initialized here, as they need all the private constants
        // above to be initialized first, but the code style imposes the public constants to be
        // defined above the private ones...
        OS_FAMILY = getOsFamily();

    ...
```

But right at the moment Python compares the first `j` in `johndoe` to the first `s` in `stanleyjobson`, it will return `False`, because it already knows that those two strings are not the same, thinking that "there's no need to waste more computation comparing the rest of the letters". And your application will say "Incorrect username or password".

But then the attackers try with username `stanleyjobsox` and password `love123`.

If your application (somehow) doesn't have to communicate with anything else and wait for it to respond, use `async def`, even if you don't need to use `await` inside.

---

If you just don't know, use normal `def`.

---

**Note**: You can mix `def` and `async def` in your *path operation functions* as much as you need and define each one using the best option for you. FastAPI will do the right thing with them.

        for (ExecutionPlanItem executionPlanItem : mavenExecutionPlan) {
            result.add(executionPlanItem.getMojoExecution());
        }
        return result;
    }

    // We need to take in multiple lifecycles
    @Test
    public void testCalculationOfBuildPlanTasksOfTheCleanLifecycleAndTheInstallLifecycle() throws Exception {
        File pom = getProject("project-with-additional-lifecycle-elements");

linked subprograms that the work is specifically designed to require,
such as by intimate data communication or control flow between those
subprograms and other parts of the work.

  The Corresponding Source need not include anything that users
can regenerate automatically from other parts of the Corresponding
Source.

  The Corresponding Source for a work in source code form is that
same work.

  2. Basic Permissions.

        .thenThrow(new InterruptedException());

    AtomicBoolean terminated = new AtomicBoolean();
    // we need to keep this in a flag because t.isInterrupted() returns false after t.join()
    AtomicBoolean interrupted = new AtomicBoolean();
    // we need to use another thread because it will be interrupted and thus using
    // the current one, owned by JUnit, would make the test fail
    Thread thread =