joinRoom
abstract suspend fun joinRoom(roomId: RoomId, via: Set<String>? = null, reason: String? = null, thirdPartySigned: Signed<JoinRoom.Request.ThirdParty, String>? = null): Result<RoomId>
abstract suspend fun joinRoom(roomAliasId: RoomAliasId, via: Set<String>? = null, reason: String? = null, thirdPartySigned: Signed<JoinRoom.Request.ThirdParty, String>? = null): Result<RoomId>