essful.
				$this->rest_authentication_status = true;
				$this->rest_authentication_type   = 'blog';
				return null;
			}

			if (
				$verified &&
				isset( $verified['type'] ) &&
				'user' === $verified['type'] &&
				! empty( $verified['user_id'] )
			) {
				// User-level authentication successful.
				$this->rest_authentication_status = true;
				$this->rest_authentication_type   = 'user';
				return $verified['user_id'];
			}

			// Something else went wrong.  Probably a signature error.
			$this->rest_authentication_status = new \WP_Error(
				'rest_invalid_signature',
				__( 'The request is not signed correctly.', 'jetpack-connection' ),
				array( 'status' => 400 )
			);
			return null;
		} finally {
			$this->doing_determine_current_user_filter = false;
		}
	}

	/**
	 * Report authentication status to the WP REST API.
	 *
	 * @param  WP_Error|mixed $value Error from another authentication handler, null if we should handle it, or another value if not.
	 * @return WP_Error|boolean|null {@see WP_JSON_Server::check_authentication}
	 */
	public function wp_rest_authentication_errors( $value ) {
		if ( null !== $value ) {
			return $value;
		}
		return $this->rest_authentication_status;
	}

	/**
	 * Resets the saved authentication state in between testing requests.
	 */
	public function reset_saved_auth_state() {
		$this->rest_authentication_status = null;
		$this->connection_manager->reset_saved_auth_state();
	}

	/**
	 * Whether the request was signed with a blog token.
	 *
	 * @since 1.29.0
	 *
	 * @return bool True if the request was signed with a valid blog token, false otherwise.
	 */
	public static function is_signed_with_blog_token() {
		$instance = self::init();

		return true === $instance->rest_authentication_status && 'blog' === $instance->rest_authentication_type;
	}
}