There are official docs for working with Photon, but what about Unity mplayer?
Ever since Unity 5.x, there's sort of no reason to use Photon since it's quite expensive, doesn't include chat, and has poor customer service.
Unity, however, would cost me about $33/mo vs Photon $200+/mo. That's pretty insane... and integrated? Yes, please!
That said, Unity MP should be popular by storm -- would be great to see official examples as Photon starts to become obsolete, by comparison.