You do this by passing a [String: Any?] dictionary of attributes to Superwall.shared.setUserAttributes(_:):

let attributes: [String: Any] = [
  "apnsToken": user.apnsTokenString,
  "username": user.username,
  "profilePic": user.profilePicUrl
Superwall.shared.setUserAttributes(attributes) // (merges existing attributes)

This is a merge operation, such that if the existing user attributes dictionary already has a value for a given property, the old value is overwritten. Other existing properties will not be affected. To unset/delete a value, you can pass nil for the value.

You can reference user attributes in campaign rules to help decide when to display your paywall. When you configure your paywall, you can also reference the user attributes in its text variables. For more information on how to that, see Configuring a Paywall.

In the future, you’ll be able to use user attributes to email/notify users about discounts.