The API for client-side HTTP authentication against a server, commonly referred to as
||Constants and static helpers related to the HTTP authentication.
||Authentication scheme registry that can be used to obtain the corresponding authentication scheme implementation for a given type of authorization challenge.
||The class represents an authentication scope consisting of a host name, a port number, a realm name and an authentication scheme name which
Credentials apply to.
||This class provides detailed information about the state of the authentication process.
||Basic user principal used for HTTP authentication
Credentials specific to the Windows platform.
||NT (MS Windows specific) user principal used for HTTP authentication
||Username and password