Member
data class Member(val id: PeerId, val identity: MemberIdentity, val liveness: Liveness, val principal: Principal? = null)
An admitted member of a Room.
A peer is a Member only after completing the admit/identify handshake. Raw Seam peers that have connected but not yet identified are not members.
identity is self-asserted by the peer in its Hello; principal is the host's verified identity for the connection (when the fabric authenticates it — see PrincipalAttested). It is null for unauthenticated connections and on the joiner side (a joiner does not verify the host).