how to get contacts on telegram using telegram api

Thanks for your help. I use node.js module for telegram bot. I 'm trying to get the user's contact on telegram using telegram api. Telegram api has 2 types and thus Bot API and Telegram API https://core.telegram.org/api I think Bot API can not get the user's contacts. I think, in order to do it, I should use contact.getContacts. This method is represented below link. https://core.telegram.org/method/contacts.getContacts

But I don't know how to use this methods. How to get the contacts? Thanks

via Warlord