@new

Description:

public static Auth? @new (Type type, Message msg, string auth_header)

Creates a new Auth of type type with the information from msg and auth_header.

This is called by [class@Session]; you will normally not create auths yourself.

type	the type of auth to create (a subtype of Auth)
msg	the Message the auth is being created for
auth_header	the WWW-Authenticate/Proxy-Authenticate header

the new Auth, or null if it could not be created