"description": "Adjusts the membership state for a user in a room. It is preferable to use\nthe membership APIs (``/rooms/<room id>/invite`` etc) when performing\nmembership actions rather than adjusting the state directly as there are a\nrestricted set of valid transformations. For example, user A cannot force\nuser B to join a room, and trying to force this state change directly will\nfail.",