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+.\" **************************************************************************
+.\" *                                  _   _ ____  _
+.\" *  Project                     ___| | | |  _ \| |
+.\" *                             / __| | | | |_) | |
+.\" *                            | (__| |_| |  _ <| |___
+.\" *                             \___|\___/|_| \_\_____|
+.\" *
+.\" * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" *
+.\" * This software is licensed as described in the file COPYING, which
+.\" * you should have received as part of this distribution. The terms
+.\" * are also available at https://curl.haxx.se/docs/copyright.html.
+.\" *
+.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+.\" * copies of the Software, and permit persons to whom the Software is
+.\" * furnished to do so, under the terms of the COPYING file.
+.\" *
+.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+.\" * KIND, either express or implied.
+.\" *
+.\" **************************************************************************
+.\"
+.TH CURLOPT_USERNAME 3 "19 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
+.SH NAME
+CURLOPT_USERNAME \- user name to use in authentication
+.SH SYNOPSIS
+.nf
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_USERNAME,
+                          char *username);
+.SH DESCRIPTION
+Pass a char * as parameter, which should be pointing to the zero terminated
+user name to use for the transfer.
+
+\fICURLOPT_USERNAME(3)\fP sets the user name to be used in protocol
+authentication. You should not use this option together with the (older)
+\fICURLOPT_USERPWD(3)\fP option.
+
+When using Kerberos V5 authentication with a Windows based server, you should
+include the domain name in order for the server to successfully obtain a
+Kerberos Ticket. If you don't then the initial part of the authentication
+handshake may fail.
+
+When using NTLM, the user name can be specified simply as the user name
+without the domain name should the server be part of a single domain and
+forest.
+
+To include the domain name use either Down-Level Logon Name or UPN (User
+Principal Name) formats. For example, EXAMPLE\\user and user@example.com
+respectively.
+
+Some HTTP servers (on Windows) support inclusion of the domain for Basic
+authentication as well.
+
+To specify the password and login options, along with the user name, use the
+\fICURLOPT_PASSWORD(3)\fP and \fICURLOPT_LOGIN_OPTIONS(3)\fP options.
+
+The application does not have to keep the string around after setting this
+option.
+.SH DEFAULT
+blank
+.SH PROTOCOLS
+Most
+.SH EXAMPLE
+.nf
+CURL *curl = curl_easy_init();
+if(curl) {
+  curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/foo.bin");
+
+  curl_easy_setopt(curl, CURLOPT_USERNAME, "clark");
+
+  ret = curl_easy_perform(curl);
+
+  curl_easy_cleanup(curl);
+}
+.fi
+.SH AVAILABILITY
+Added in 7.19.1
+.SH RETURN VALUE
+Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
+CURLE_OUT_OF_MEMORY if there was insufficient heap space.
+.SH "SEE ALSO"
+.BR CURLOPT_USERPWD "(3), " CURLOPT_PASSWORD "(3), "
+.BR CURLOPT_HTTPAUTH "(3), " CURLOPT_PROXYAUTH "(3)"