Users
Console operators and their access to each casino.
List the members of the active casino
The people who can act on the casino in `X-Tenant-Id`, with the role and
Add a member
Adds a person to the casino in `X-Tenant-Id`. If the address already has an
Remove a member from this casino
Detaches the membership and leaves the ACCOUNT alone: the person keeps their
One member
A member of someone else's casino is a `404`, not a `403`: the answer must not
Change a member's role or status
Changes the MEMBERSHIP, never the account: the person's name, address and