public function add_role( $args, $assoc_args ) {
		$user = $this->fetcher->get_check( $args[0] );

		$role = $args[1];

		self::validate_role( $role );

		$user->add_role( $role );

		WP_CLI::success( "Added '{$role}' role for {$user->user_login} ({$user->ID})." );
	}