* La API verifica ese `username` y `password`, y responde con un "token" (no hemos implementado nada de esto aún).
    * Un "token" es solo un string con algún contenido que podemos usar luego para verificar a este usuario.
    * Normalmente, un token se establece para que expire después de algún tiempo.

        response.onResponseEnd(ShutdownConnection)
        response.removeHeader("Content-Length")
      }

      override fun newRequestBody(body: String): RequestBody = throw TestAbortedException("END_OF_STREAM not implemented for requests")
    }, ;

    abstract fun setBody(
      response: MockResponse.Builder,
      content: Buffer?,
      chunkSize: Int,
    )

Esse exemplo não implementa o callback em si (que poderia ser apenas uma linha de código), apenas a parte da documentação.

/// tip | Dica

O callback real é apenas um request HTTP.

- Kubeadm: enhance certs check-expiration to show the expiration info of related CAs ([#83932](https://github.com/kubernetes/kubernetes/pull/83932), [@SataQiu](https://github.com/SataQiu))
- Kubeadm: implemented structured output of 'kubeadm token list' in JSON, YAML, Go template and JsonPath formats ([#78764](https://github.com/kubernetes/kubernetes/pull/78764), [@bart0sh](https://github.com/bart0sh))

* Implemented `kubeadm upgrade plan` for checking whether you can upgrade your cluster to a newer version ([#48899](https://github.com/kubernetes/kubernetes/pull/48899), [@luxas](https://github.com/luxas))
    * Implemented `kubeadm upgrade apply` for upgrading your cluster from one version to an other

- Added a `runtime.ApplyConfiguration` interface implemented by all generated apply configuration types. ([#132194](https://github.com/kubernetes/kubernetes/pull/132194), [@alvaroaleman](https://github.com/alvaroaleman)) [SIG API Machinery and Instrumentation]

  * [alpha] CRI now supports specifying the GID of the container at both LinuxSandboxSecurityContext and LinuxContainerSecurityContext in addition to specifying the UID. Support is implemented for dockershim. [@krmayankk]

- Added regions ap-northeast-3 and eu-west-3 to the list of well known AWS regions. ([#70252](https://github.com/kubernetes/kubernetes/pull/70252), [@nckturner](https://github.com/nckturner))
- kubeadm: Implemented preflight check to ensure that number of CPUs ([#70048](https://github.com/kubernetes/kubernetes/pull/70048), [@bart0sh](https://github.com/bart0sh))

        current learning rate value instead of a `LearningRateSchedule` object
        as before. If you need to access the `LearningRateSchedule` object,
        please use `optimizer._learning_rate`.
    *   **You implemented a custom optimizer based on the old optimizer.**
        Please set your optimizer to subclass
        `tf.keras.optimizer.legacy.XXX`. If you want to migrate to the new

    * If the serialization type is application/vnd.kubernetes.protobuf, and protobuf marshaling is not implemented for the requested API resource type, a '406 Not Acceptable is returned'.
    * If the serialization type is 'application/json':