Changes the username displayed before your hostmask if the server you're connecting to allows it.  Some servers will only trust the username reply from the ident service.  You must specify this *before* connecting to the network. If you omit <username>, the current username will be shown.
更改在主机掩码前方显示的用户名（需要您正在连接的服务器允许）。一些服务器只信任来自 ident 服务的用户名回复。必须在连接到网络 >之前< 指定此项。如果省略 <username>，则显示目前的用户名。