AddVoteToCardAsync - rwjdk/TrelloDotNet GitHub Wiki
Add a Vote to a Card for a specific member
Examples
string cardId = "64f754e09e99df1f544045d5";
string memberIdToCastTheVote = "434fe3333dd3d3d4d43";
await TrelloClient.AddVoteToCardAsync(cardId, memberIdToCastTheVote);