例えば、`pip install python-multipart`。

これは、**OAuth2**が `ユーザー名` や `パスワード` を送信するために、「フォームデータ」を使うからです。

///

例を実行します:

<div class="termy">

```console
$ uvicorn main:app --reload

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

## 確認

// Copyright (c) 2015-2024 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.
//
// This program is distributed in the hope that it will be useful

  /** Number of (unsynchronized) retries in the containsValue method. */
  static final int CONTAINS_VALUE_RETRIES = 3;

  /**
   * Number of cache access operations that can be buffered per segment before the cache's recency
   * ordering information is updated. This is used to avoid lock contention by recording a memento

        // Test that exception is serializable
        String message = "Serialization test";
        LdapOperationException exception = new LdapOperationException(message);

        // Verify the exception can be created (serialVersionUID is present)
        assertNotNull(exception);
    }

    public void test_stackTrace() {
        // Test that stack trace is properly captured

        // Test that the exception has the correct serialVersionUID field
        ScriptEngineException exception = new ScriptEngineException("Serialization test");

        // Verify the exception can be created and basic properties work
        assertNotNull(exception);
        assertEquals("Serialization test", exception.getMessage());
    }

    public void test_stackTrace() {

    }

    public void test_serialVersionUID() {
        // Test that the exception is serializable
        ThemeException exception = new ThemeException("Serialization test");

        // Verify that the exception can be created and has the expected structure
        assertNotNull(exception);
        assertTrue(exception instanceof java.io.Serializable);
    }

    public void test_nestedExceptions() {

   */
  public final String to(CaseFormat format, String str) {
    checkNotNull(format);
    checkNotNull(str);
    return (format == this) ? str : convert(format, str);
  }

  /** Enum values can override for performance reasons. */
  String convert(CaseFormat format, String s) {
    // deal with camel conversion
    StringBuilder out = null;
    int i = 0;
    int j = -1;

      map.put(entry.getKey(), entry.getValue());
    }
    getMap().putAll(map);
  }

  /**
   * Returns the {@link Method} instance for {@link #testPutAll_nullKeyUnsupported()} so that tests
   * can suppress it with {@code FeatureSpecificTestSuiteBuilder.suppressing()} until <a
   * href="https://bugs.openjdk.org/browse/JDK-5045147">JDK-5045147</a> is fixed.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection

   * finishing. Also acts as a concurrency test to make sure the locking is done correctly when a
   * future is finishing so that no listeners can be lost.
   */
  public void testAllListenersCompleteSuccessfully()
      throws InterruptedException, ExecutionException {

    ExecutorService exec = newCachedThreadPool();

    int listenerCount = 20;

import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import org.jspecify.annotations.Nullable;

/**
 * Methods factored out so that they can be emulated differently in GWT.
 *
 * @author Hayward Chan
 */
@GwtCompatible
final class Platform {

  /** Returns the platform preferred implementation of a map based on a hash table. */