Require Redirect for SystemUser docs

[SuperOfficeDevNet]

The following page is referenced from System User Client nuget package:

https://docs.superoffice.com/en/api/authentication/online/auth-application/get-system-user-ticket.html

This page no longer exists, and no redirect was ever implemented although it is still referenced from other external resources.

[digitaldiina]

We removed the special-case mapping in docfx.json for the authentication folder last summer, intending it to be published at en/api/netserver/authentication - should we revert that change?

https://github.com/SuperOfficeDocs/build-docs/commit/5c481d07d368a863557dc942951f39282c3df984

[SuperOfficeDevNet]

Is it not possible to add a redirect file?

[digitaldiina]

@SuperOfficeDevNet The issue pertains to the entire authentication section, not just this file.

[SuperOfficeDevNet]

@SuperOfficeDevNet The issue pertains to the entire authentication section, not just this file.

The link provided in the OP is to this file.