public async Task SendMessage(SendMessageRequest request)
{
var newMessage = _chatMessageService.CreateChatMessage(request.SenderUserId, request.RoomId, request.Text);
if (newMessage == null)
{
return;
}
var result = _mapper.Map <ChatMessageModel>(newMessage);
await this.Clients.Group(newMessage.ChatRoomId.ToString()).NewChatMessage(result);
}