registerVisitor()

This API allows you to register a user using a unique ID (which can be of both numbers and characters). With the help of this ID, chats can be restored to any device you want, and if you have two devices registered with the same ID, you can have live syncing of chats. If your application has login and logout life cycles, you can enroll your visitor, and their activity in the SDK will be synchronized across multiple platforms.

Note: The visitor's unique ID should match this regex pattern, "^[A-Za-z0-9_@.\\-]{1,100}$"