Source

File: wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php

protected function prepare_links( $user ) {
		$links = array(
			'self'       => array(
				'href' => rest_url( sprintf( '%s/%s/%d', $this->namespace, $this->rest_base, $user->ID ) ),
			),
			'collection' => array(
				'href' => rest_url( sprintf( '%s/%s', $this->namespace, $this->rest_base ) ),
			),
		);

		return $links;
	}