[Feature Request] Add a way to auto discover users based on headers

[LelouBil]

Hello, I am looking into creating a home assistant add-on for homebox. Add-ons in home assistant are proxied and the following environment variables are set :

Header name	Description
X-Remote-User-Id	ID of the authenticated Home Assistant user
X-Remote-User-Name	The username of the authenticated user
X-Remote-User-Display-Name	The display name of the authenticated user

It would be great if homebox had a configurable mechanism to :

• Auto login as the user ID contained in X-Remote-User-Id
• Create the user if it doesn't exist, using X-Remote-User-Name and/or X-Remote-User-Display-Name
• Seamlessly get into homebox after user creation

[LelouBil]

Oh sorry, I created the issue on the wrong project....