configure OkHttp 3.13 to allow TLSv1 and TLSv1.1 connections:

    ```
    OkHttpClient client = new OkHttpClient.Builder()
        .connectionSpecs(Arrays.asList(ConnectionSpec.COMPATIBLE_TLS))
        .build();
    ```

 *  New: You can now access HTTP trailers with `Response.trailers()`. This method may only be called
    after the entire HTTP response body has been read.

# Simple OAuth2 with Password and Bearer

Now let's build from the previous chapter and add the missing parts to have a complete security flow.

## Get the `username` and `password`

We are going to use **FastAPI** security utilities to get the `username` and `password`.

OAuth2 specifies that when using the "password flow" (that we are using) the client/user must send a `username` and `password` fields as form data.

/// warning

このベースイメージや類似のイメージは**必要ない**可能性が高いので、[上記の: FastAPI用のDockerイメージをビルドする（Build a Docker Image for FastAPI）](#build-a-docker-image-for-fastapi)のようにゼロからイメージをビルドする方が良いでしょう。

///

このイメージには、利用可能なCPUコアに基づいて**ワーカー・プロセスの数**を設定する**オートチューニング**メカニズムが含まれています。

	emptyBanner = color.BgRed(strings.Repeat(" ", len(logTag))) + " "
	bannerWidth = len(logTag) + 1
)

func (f fatalMsg) pretty(msg string, args ...interface{}) {
	// Build the passed error message
	errMsg := fmt.Sprintf(msg, args...)

	tagPrinted := false

	// Print the error message: the following code takes care
	// of splitting error text and always pretty printing the

        systemProperties.setProperty("maven.version", mavenVersion);

        String mavenBuildVersion = CLIReportingUtils.createMavenVersionString(buildProperties);
        systemProperties.setProperty("maven.build.version", mavenBuildVersion);

        Map<String, String> result = toMap(systemProperties);
        result.putAll(context.systemPropertiesOverrides);
        return result;
    }

  // Rules holds all the PolicyRules for this ClusterRole
  // +optional
  repeated PolicyRule rules = 2;

  // AggregationRule is an optional field that describes how to build the Rules for this ClusterRole.
  // If AggregationRule is set, then the Rules are controller managed and direct changes to Rules will be
  // stomped by the controller.
  // +optional

That documentation will show up in the Swagger UI at `/docs` in your API, and it will let external developers know how to build the *external API*.

This example doesn't implement the callback itself (that could be just a line of code), only the documentation part.

/// tip

The actual callback is just an HTTP request.

                if (auth != null) {
                    repo = new RemoteRepository.Builder(repo)
                            .setAuthentication(auth)
                            .build();
                    AuthenticationContext authCtx = AuthenticationContext.forRepository(session, repo);
                    Authentication result = new Authentication(

    eventListener.callStart(this)
  }

  @Throws(IOException::class)
  internal fun getResponseWithInterceptorChain(): Response {
    // Build a full stack of interceptors.
    val interceptors = mutableListOf<Interceptor>()
    interceptors += client.interceptors
    interceptors += RetryAndFollowUpInterceptor(client)

//go:build windows
// +build windows

// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//