Integrate with Segment

beehiiv Integration Guides: Integrate with Segment

Learn how to connect your Segment account to a beehiiv account which will enable you to match users that you are tracking across your different web properties with your beehiiv publication. 

Around the 1:32 mark in the video, here is a link to the referenced code that you will need to copy and paste to complete the process: https://pastebin.com/Eub2hF6L.