How to call custom headers from NginX?

[moutasem1989]

Here I managed to setup Authentik + NginX Proxy Manager as Reverse Proxy Authentication. As Seen, the Authorization header is declared in the NPM custom configuration. I would like to get the value from Authentik Custom Headers declared for Users/Groups.

in User/Group I did add this am mentioned in the documentation:

additionalHeaders:
    X-My-Header: value

I created a Property Scoop Mappings for User:

return {
    "ak_proxy": {
        "user_attributes": {                                          #changing user to group is for group property mapping?
            "additionalHeaders": {
                "X-My-Header": request.user.cockpit     #is this correct?
            }
        }
    }
}

I then added the scoops to my proxy provider. How how do I call this value from NPM?
It must be something like proxy_set_header Remote-User $authentik_cockpit but is sadly not successful !
Help!