CURLcode curl_easy_setopt(CURL *handle, CURLOPT_USERNAME,
Pass a char * as parameter, which should be pointing to the zero terminated
user name to use for the transfer.
CURLOPT_USERNAME(3) sets the user name to be used in protocol
authentication. You should not use this option together with the (older)
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 dont 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
To include the domain name use either Down-Level Logon Name or UPN (User
Principal Name) formats. For example, EXAMPLE\user and email@example.com
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
CURLOPT_PASSWORD(3) and CURLOPT_LOGIN_OPTIONS(3) options.