## See it in action

Open the interactive docs: <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.

### Authenticate

Click the "Authorize" button.

Use the credentials:

User: `johndoe`

Password: `secret`

<img src="/img/tutorial/security/image04.png">

After authenticating in the system, you will see it like:

h(b),i.push(e),e.valAttr("current-error",b),d&&a.formUtils.dialogs.applyInputErrorStyling(e,c)},g=[],h=[],i=[],j=this,k=function(b,d){return"submit"===d||"button"===d||"reset"===d||a.inArray(b,c.ignore||[])>-1};if(d&&a.formUtils.dialogs.removeAllMessagesAndStyling(j,c),j.find("input,textarea,select").filter(':not([type="submit"],[type="button"])').each(function(){var d=a(this),e=d.attr("type"),h="radio"===e||"checkbox"===e,i=d.attr("name");if(!k(i,e)&&(!h||a.inArray(i,g)<0)){h&&g.push(i);var l=a...

Go to the *path operation* "Get `/slowusers/`" in all of the tabs. Use the "Try it out" button and execute the request in each tab, one right after the other.

The tabs will wait for a bit and then some of them will show `Internal Server Error`.

### What happens

  - author: Amit Chaudhary
    author_link: https://twitter.com/amitness
    link: https://amitness.com/2020/06/fastapi-vs-flask/
    title: FastAPI for Flask Users
  - author: Louis Guitton
    author_link: https://twitter.com/louis_guitton
    link: https://guitton.co/posts/fastapi-monitoring/
    title: How to monitor your FastAPI service
  - author: Precious Ndubueze
    author_link: https://medium.com/@gabbyprecious2000

    * verifica che la richiesta abbia un attributo opzionale `is_offer` e che sia di tipo `bool`, se presente.
    * Tutto questo funzionerebbe anche con oggetti JSON più complessi.
* Convertirà *da* e *a* JSON automaticamente.
* Documenterà tutto con OpenAPI, che può essere usato per:
    * Sistemi di documentazione interattivi.
    * Sistemi di generazione di codice dal lato client, per molti linguaggi.

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