public static function messageuser_link_params(int $useridto) : array {
        global $USER;

        return [
            'id' => 'message-user-button',
            'role' => 'button',
            'data-conversationid' => api::get_conversation_between_users([$USER->id, $useridto]),
            'data-userid' => $useridto,
        ];
    }