I am trying to use the AddFriend API, and add a friend by sending their email address in the "FriendEmail" field. The email address I am sending is the same one they added using AddOrUpdateContactEmail. I get "User not found" in the response to these requests. Why am I not able to add a friend using their contact email address?
I found that I had to use the email address on the master account in order to add the friend. Is there an API that allows that email to be set, so I can keep it in-sync with the contact email address?