How do I limit the number of votes each user can cast in a poll?

Note that this feature is only available on paid Simple Poll plans.

To create a poll in which each user can only vote once, use the following syntax:
/poll "What's your favorite sport? (select only one)" "Football" "Tennis" "Basketball" limit 1
If you want to limit votes to two per user, you can use the following:
/poll "What are your favorite sports? (select two)" "Football" "Tennis" "Basketball" limit 2

Notice the "limit" followed by a number at the end of the slash command.

If you want to limit votes and want to keep the responses anonymous, you can combine those two flags. Example:
/poll "What's your favorite sport? (select only one)" "Football" "Tennis" "Basketball" anonymous limit 1