Discuss providing a homebox field type

Just a potential future feature. Might not be too hard to implement, if it just references a user's homebox instance, like in the other cases.

@Grevil perhaps you'd like to give it a try in a MR here?

We should consider if providing a dedicated service to get the user homebox instance would be helpful, to make it easier and to unify getting the code.

This isn't a feature we currently need, but happy to review MR's or provide this as sponsored development.