The name of the user needed to access the Visual SourceSafe database. When no NAnt.Contrib.Tasks.SourceSafe.BaseTask.UserName is specified and "Use network name for automatic user log in" is enabled, then the current Windows username will be used to log in.

[TaskAttribute("user", Required = false)]
[Obsolete("Use \"username\" attribute instead.", false)]
public virtual string Login { get; set; }