SMembers

Redix.SMembers(key, callback)

-- Get all online players
Redix.SMembers('players:online', function(err, players)
    if not err then
        print('Online players:')
        for _, playerId in ipairs(players) do
            print('- ' .. playerId)
        end
    end
end)

-- Get all permissions
Redix.SMembers('user:123:permissions', function(err, permissions)
    if HasPermission(permissions, 'admin') then
        print('User is admin')
    end
end)