Merging Users in Kinvey
问题 Situation: User A registers an account in our application and logs in. For what ever reason logs out. Logs in to the application again using Facebook social sign on with an account that has the same email associated with it as the original registration had. A second account is created for this sign on and 2 accounts exist in the system. How can I merge these accounts into a single account during the social sign on (by querying for the existence of that email) automatically or with User