/**
  * Identifies the user to a server.
  *
  * @param \Phergie\Irc\ConnectionInterface $connection Connection on which
  *        to identify the user
  * @param \Phergie\Irc\Client\React\WriteStream $writeStream Stream to
  *        receive commands identifying the user
  */
 protected function identifyUser(ConnectionInterface $connection, WriteStream $writeStream)
 {
     $password = $connection->getPassword();
     if ($password) {
         $writeStream->ircPass($password);
     }
     $writeStream->ircUser($connection->getUsername(), $connection->getHostname(), $connection->getServername(), $connection->getRealname());
     $writeStream->ircNick($connection->getNickname());
 }