content: ' subscriber: The new user subscriber info
  ' error: Will be present if there was an error during the process
  Purchases().logIn("my_user_id", sub(subscriber, error)
  end sub)
  
  ' Calling logOut generates a new anonymous user
  ' subscriber: The new anonymous user subscriber info
  ' error: Will be present if there was an error during the process
  Purchases().logOut(sub(subscriber, error)
  end sub)