Create a conference call from multiple calls. If Multiparty Calls is enabled, this method removes a rep from a consult call and adds them to a multiparty call.
The calls to conference together. In API version 63.0 or later, this function supports conferencing a consult call and a multiparty call if Multiparty Calls are enabled. In API version 62.0 and earlier, this function supports conferencing two calls together.