public async Task Candidate(ISignalingCandidatePayload payload)
 {
     await _mediator.Publish(new SignalingCandidateNotification(payload));
 }
 public SignalingCandidateNotification(ISignalingCandidatePayload payload)
 {
     Sender    = payload.Sender;
     Receiver  = payload.Receiver;
     Candidate = payload.Candidate;
 }