How to accept parameters from a link in node.js?

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How to accept parameters from the link https://vk.com/dev/bizmessages_doc?f=2.6 on node.js. Transfer pr.. - 2.6 (parameters ref and ref_source) ?
namely, the algorithm for receiving an event about following a link)
Example: there is a ref link from a bot, a person gave this link to a friend who is not in his referrals, he followed it and wrote to the bot, after which the bot gave one and the other person the corresponding bonus)
Link: https://vk.me/club id?ref=id of the person who invites&ref_source=unique referral code