| hostId | Id of udp socket used to establish connection. |
| address | Ip4. |
| port | Port. |
| network | Guid of relay network. |
| source | Guid of user. |
| error | Possible error (NetworkError.Ok if success). |
| node | Slot id for this user. |
Create dedicated connection to relay server.
Client calls this function to set itself as an owner of the network group on the relay server. This client should call ReceiveRelayEventFromHost periodically to be notified about connection/disconnection events to/from Relay server.