Authors and Users in ELNs
Related to #910 (closed)
There already are two sections:
nomad.datamodel.datamodel.Author(for human authors in general,
nomad.datamodel.datamodel.User(specialisation of Author for humans with a NOMAD account).
User we should provide a specialized edit component that can be used for reference quantities that use
User as type. This should for similar to what we have on the "manage users" functions on the upload page.
Author we should provide the necessary ELN annotations that allows to use the section as a sub-section or base section in ELNs.