FEP-baf5: Administrator Collection

@julian said: * I have to be careful when I use the term "authorization" because if I say it three times @thisismissem will show up and start talking about OAuth2/OIDC again. Correction: it's just a single mention that makes me appear, people tend to confuse me with a genie but we're quite different. (Also I saw other replies here but had an MCAS attack hangover today so didn't have energy to reply. I'll try to reply soon)