What does this "Header" Authentication Type mean for QVWS Settings under SETUP TAB in QMC

[sanchayan]

From Qlik Community it is defined as :

• Header, meaning that an http header specified under Parameters is used:
  • Header Name

                         If a customized login system is used, the http header has to be specified, in order to configure the login process in the                          QlikView AccessPoint. To configure the header name, enter a value in this text box.

                              Default value: QVUSER.

• Prefix

                         To configure the prefix used for the header, enter a value in this text box.

                              Default value: CUSTOM\

What I got is that by default users defined in custom directory (CUSTOM\) is authenticated as mentioned in the Prefix. Though I didnt get the Header Name section or how the user logging in into Access Point is authenticated.

[Peter_Cammaert]

Header Name = the http header tag/attribute name that specifies the authenticated username. QlikView needs this info to tie a existing/dynamic license assignment, groups and other permissions to an authenticated user.

And, I hope you get the message: QlikView doesn't do authentication (except if you select Custom Authentication); an external system has to do the authentication.

[sanchayan]

Is this header attribute which is QVUSER as shown in example above, consisting of all the users who will be authenticated upon access point login?

And if so, then where is this attribute stored?