# File lib/net/ssh/authentication/methods/none.rb, line 12
          def authenticate(next_service, user="", password="")
            send_message(userauth_request(user, next_service, "none")) 
            message = session.next_message
            
            case message.type
              when USERAUTH_SUCCESS
                debug { "none succeeded" }
                return true
              when USERAUTH_FAILURE
                debug { "none failed" }
              
                raise Net::SSH::Authentication::DisallowedMethod unless
                  message[:authentications].split(/,/).include? 'none'
              
                return false
              else
                raise Net::SSH::Exception, "unexpected reply to USERAUTH_REQUEST: #{message.type} (#{message.inspect})"
            end   
            
          end