public async Task SendMessage(string room, string user, string message, CancellationToken cancellationToken)
{
ChatRoom roomStruct = await chatRoomRepo.GetRoomAsync(room, cancellationToken);
if (roomStruct == null)
{
// lazy create room
roomStruct = new ChatRoom(room);
}
var chatMessage = new ChatMessage(user, message);
Task dummy = chatRoomRepo.AddMessageAsync(room, chatMessage, cancellationToken);
// no need to await for message to be sent
}