post
{protocol}://api.ws.sonos.com/control/api/{version}/households//groups/createGroup
Use the createGroup command in the groups namespace to create a new group from a list
of players. The player returns a group object with the group ID. This may be an existing
group ID if an existing group is a subset of the new group. In this case, Sonos may
build the new group by adding new players to the existing group.