assertFalse(listener.healthyCalled);
  }

  /**
   * This covers a bug where if a listener was installed that would stop the manager if any service
   * fails and something failed during startup before service.start was called on all the services,
   * then awaitStopped would deadlock due to an IllegalStateException that was thrown when trying to
   * stop the timer(!).
   */

```

</div>

## Check it { #check-it }

Go to the interactive docs at: [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs).

You will see something like this:

<img src="/img/tutorial/security/image01.png">

/// check | Authorize button!

You already have a shiny new "Authorize" button.

trying to find her way out.  `I shall be punished for it now, I
suppose, by being drowned in my own tears!  That WILL be a queer
thing, to be sure!  However, everything is queer to-day.'

  Just then she heard something splashing about in the pool a
little way off, and she swam nearer to make out what it was:  at
first she thought it must be a walrus or hippopotamus, but then
she remembered how small she was now, and she soon made out that

    assertFalse(listener.healthyCalled);
  }

  /**
   * This covers a bug where if a listener was installed that would stop the manager if any service
   * fails and something failed during startup before service.start was called on all the services,
   * then awaitStopped would deadlock due to an IllegalStateException that was thrown when trying to
   * stop the timer(!).
   */

            and those objects can't (and shouldn't be) serialized to JSON.
            """
        ),
    ] = True,
) -> Any:
    """
    Convert any object to something that can be encoded in JSON.

    This is used internally by FastAPI to make sure anything you return can be
    encoded as JSON before it is sent to the client.

      setException(e);
      return;
    } catch (Error e) {
      /*
       * StackOverflowError, OutOfMemoryError (e.g., from allocating ExecutionException), or
       * something. Try to treat it like a RuntimeException. If we overflow the stack again, the
       * resulting Error will propagate upward up to the root call to set().
       */
      setException(e);
      return;
    }

        fw.println("#");
        fw.println("# The checker also rejects Markdown-style links, such as [text](https://example.com/something) as they do not render properly");

    }

    private void gatherDeadLinksInFileReleaseNotes(Map<File, List<Error>> errors) {
        int lineNumber = 0;
        List<Error> errorsForFile = new ArrayList<>();

Start your application and go to [http://127.0.0.1:8000/static/redoc.standalone.js](http://127.0.0.1:8000/static/redoc.standalone.js).

You should see a very long JavaScript file for **ReDoc**.

It could start with something like:

```JavaScript
/*! For license information please see redoc.standalone.js.LICENSE.txt */
!function(e,t){"object"==typeof exports&&"object"==typeof module?module.exports=t(require("null")):
...
```

This also means that if something changed, it will be **reflected** on the client code automatically. And if you **build** the client, it will error out if you have any **mismatch** in the data used.

///

{* ../../docs_src/security/tutorial003_an_py310.py hl[87] *}

/// tip

By the spec, you should return a JSON with an `access_token` and a `token_type`, the same as in this example.

This is something that you have to do yourself in your code, and make sure you use those JSON keys.

It's almost the only thing that you have to remember to do correctly yourself, to be compliant with the specifications.