In particular, when running on **Kubernetes** you will probably **not** want to use Gunicorn and instead run **a single Uvicorn process per container**, but I'll tell you about it later in that chapter.

## Gunicorn with Uvicorn Workers

 */
package okhttp3.tls.internal.der

import java.net.ProtocolException

/**
 * Handles basic types that always use the same tag. This supports optional types and may set a type
 * hint for further adapters to process.
 *
 * Types like ANY and CHOICE that don't have a consistent tag cannot use this.
 */
internal data class BasicDerAdapter<T>(
  private val name: String,

 * limitations under the License.
 */
package okhttp3.tls.internal.der

import okio.ByteString

/**
 * A value whose type is not specified statically. Use this with [Adapters.any] which will attempt
 * to resolve a concrete type.
 */
internal data class AnyValue(
  var tagClass: Int,
  var tag: Long,
  var constructed: Boolean = false,
  var length: Long = -1L,

  <groupId>org.sonatype.mavenbook.multi</groupId>
  <artifactId>parent</artifactId>
  <version>0.9-${changelist}-SNAPSHOT</version>
  <packaging>pom</packaging>
  <name>Multi Chapter Parent Project</name>

  <!-- Optimized from https://github.com/sonatype/maven-example-en/tree/master/examples/ch-multi -->
  <modules>
    <module>simple-parent</module>
  </modules>

  <parent>
    <groupId>org.sonatype.mavenbook.multi</groupId>
    <artifactId>simple-parent</artifactId>
  </parent>
  <artifactId>simple-weather</artifactId>
  <packaging>jar</packaging>

  <name>Multi Chapter Simple Weather API</name>

  <dependencies>
    <dependency>
      <groupId>org.sonatype.mavenbook.multi</groupId>
      <artifactId>simple-testutils</artifactId>
      <scope>test</scope>
    </dependency>

  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>org.sonatype.mavenbook.multi</groupId>
    <artifactId>simple-parent</artifactId>
  </parent>

  <artifactId>simple-webapp</artifactId>
  <name>Multi Chapter Simple Web Application Project</name>
  <dependencies>
    <dependency>
      <groupId>org.sonatype.mavenbook.multi</groupId>
      <artifactId>simple-weather</artifactId>
    </dependency>
  </dependencies>
  <build>

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// https://www.eclipse.org/jetty/documentation/current/alpn-chapter.html#alpn-versions
private fun alpnBootVersionForPatchVersion(patchVersion: Int): String? {
  return when (patchVersion) {
    in 0..24 -> "8.1.0.v20141016"
    in 25..30 -> "8.1.2.v20141202"

# 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.

  <parent>
    <groupId>org.sonatype.mavenbook.multi</groupId>
    <artifactId>parent</artifactId>
  </parent>
  <artifactId>simple-parent</artifactId>
  <packaging>pom</packaging>
  <name>Multi Chapter Simple Parent Project</name>

  <modules>
    <module>simple-weather</module>
    <module>simple-webapp</module>

    <!-- On purpose at the end, project graph is responsible for ordering -->

  /** Type hints scoped to the call stack, manipulated with [pushTypeHint] and [popTypeHint]. */
  private val typeHintStack = mutableListOf<Any?>()

  /**
   * The type hint for the current object. Used to pick adapters based on other fields, such as
   * in extensions which have different types depending on their extension ID.
   */
  var typeHint: Any?
    get() = typeHintStack.lastOrNull()
    set(value) {