terminatePoll
End a poll, making it impossible to vote anymore.
This API allows an organizer to move the poll from the published state to the ended state. Once ended, it is not possible to vote in the poll anymore. The poll and its result remain available to any member of the room.
Return
A RainbowResult indicating success or failure. In case of failure, the RainbowResult will contain error details.
Parameters
pollId
The unique identifier of the poll.