request_read
Description:
Emitted when the server has successfully read a request.
 message will have all of its request-side information filled in, and if the message was authenticated, client will
      have information about that. This signal is emitted before any (non-early) handlers are called for the message, and if it sets the message's 
      status_code, then normal handler processing will be skipped.
Parameters:
| client | 
           the client context  | 
      
| message | 
           the message  |