func getScope(t time.Time, region string) string {
	scope := strings.Join([]string{
		t.Format(yyyymmdd),
		region,
		string(serviceS3),
		"aws4_request",
	}, SlashSeparator)
	return scope
}

// getStringToSign a string based on selected query values.
func getStringToSign(canonicalRequest string, t time.Time, scope string) string {

/// note | Technical Details

A `Request` has a `request.scope` attribute, that's just a Python `dict` containing the metadata related to the request.

A `Request` also has a `request.receive`, that's a function to "receive" the body of the request.

The `scope` `dict` and `receive` function are both part of the ASGI specification.

And those two things, `scope` and `receive`, are what is needed to create a new `Request` instance.

pkg go/types, method (*Scope) Child(int) *Scope
pkg go/types, method (*Scope) Contains(token.Pos) bool
pkg go/types, method (*Scope) End() token.Pos
pkg go/types, method (*Scope) Innermost(token.Pos) *Scope
pkg go/types, method (*Scope) Insert(Object) Object
pkg go/types, method (*Scope) Len() int
pkg go/types, method (*Scope) Lookup(string) Object
pkg go/types, method (*Scope) LookupParent(string, token.Pos) (*Scope, Object)

  <version>1.0-SNAPSHOT</version>
  <dependencies>
    <dependency>
      <groupId>org.apache.maven.its</groupId>
      <artifactId>maven-core-it-support</artifactId>
      <version>1.3</version>
      <scope>runtime</scope>
      <exclusions>
        <exclusion>
          <groupId>commons-lang</groupId>
          <artifactId>commons-lang</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
  </dependencies>

        <version>1.0</version>
      </dependency>
      <dependency>
        <groupId>maven-test</groupId>
        <artifactId>t07-d</artifactId>
        <version>1.0</version>
        <scope>test</scope>
        <optional>false</optional>
      </dependency>
    </dependencies>
  </dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t07-a</artifactId>

/// note | Технические детали

У `Request` есть атрибут `request.scope` — это просто Python-`dict`, содержащий метаданные, связанные с HTTP-запросом.

У `Request` также есть `request.receive` — функция для «получения» тела запроса.

И `dict` `scope`, и функция `receive` являются частью спецификации ASGI.

Именно этих двух компонентов — `scope` и `receive` — достаточно, чтобы создать новый экземпляр `Request`.

 * Maven execution. This scope should be used for stateless services or components
 * that can be safely shared across the entire build process.
 * <p>
 * Example usage:
 * <pre>
 * {@literal @}Singleton
 * public class GlobalConfiguration {
 *     // Implementation
 * }
 * </pre>
 *
 * @see Scope
 * @since 4.0.0
 */
@Scope
@Documented
@Retention(RUNTIME)

 * and discarded after session execution completes.
 * <p>
 * A {@code org.apache.maven.api.Session} object is available in the scope of this annotation.
 *
 * @since 4.0.0
 */
@Scope
@Documented
@Retention(RUNTIME)
@Target({TYPE, METHOD})

  <packaging>jar</packaging>
  <version>1.0</version>

  <dependencies>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t09-c</artifactId>
      <version>1.0</version>
      <scope>compile</scope>
    </dependency>
  </dependencies>

  <version>1.0</version>
  <dependencies>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t06-d</artifactId>
      <version>1.1</version>
      <type>jar</type>
      <scope>compile</scope>
      <optional>true</optional>
    </dependency>
  </dependencies>